There are a couple other at large threads going, but I have slightly different calculation of who gets in. I have replied to the other threads, but I wanted to show the entire process I went through.
Autos: Everyone knows these by now.
At large points after autos:
NE: Columbia(1), Brown(0)
MA: Penn(0), LaSalle(0)
SE: Clemson(1), UVA(0)
GL: Butler(9), UM(5), IU(5), Oh St(0), Mich St(1), CMU(1), Miami(2)
MW: Iowa(1)
SC: Rice(0)
MTN: AFA(6), UNM(1), Colo St(0), NAU(0)
W: Cal Poly(5)
SO: Georgia(0)
Round 1
Compare: Columbia(1), Clemson(1), Butler(9), Iowa(1), AFA(6), Cal Poly(5)
Analysis: Butler has the most points
Selection: BUTLER IS IN THE MEET
Point Changes: AFA(7), IU(6), Cal Poly(6)
Round 2
Compare: Columbia(1), Clemson(1), Michigan(5), Iowa(1), AFA(7), Cal Poly(6)
Analysis: AFA has the most points
Selection: AIR FORCE IS IN THE MEET
Point Changes: Cal Poly(7)
Round 3
Compare: Columbia(1), Clemson(1), Michigan(5), Iowa(1), New Mexico(1), Cal Poly(7)
Analysis: Cal Poly has the most points
Selection: CAL POLY IS IN THE MEET
Point Changes: None
Round 4
Compare: Columbia(1), Clemson(1), Michigan(5), Iowa(1), New Mexico(1)
Analysis: Michigan has the most points
Selection: MICHIGAN IS IN THE MEET
Point Changes: Iowa(2)
Round 5
Compare: Columbia(1), Clemson(1), Indiana(6), Iowa(2), New Mexico(1)
Analysis: Indiana has the most points
Selection: INDIANA IS IN THE MEET
Point Changes: None
Round 6
Compare: Columbia(1), Clemson(1), Iowa(2), New Mexico(1)
Analysis: Iowa has the most points
Selection: IOWA IS IN THE MEET
Point Changes: Colorado St(2), Ohio St(1), Dartmouth(1), Brown(1), Villanova(1), NAU(1), Duke(1), Oregon(1)
Round 7
Compare: Columbia(1), Clemson(1), Ohio State(1), New Mexico(1)
Analysis: UNM has head-head wins over Columbia and Clemson. UNM beats OH St on common opponents 2-1(Colo State and Utah St to UVA)
Selection: NEW MEXICO IS IN THE MEET
Point Changes: CMU(2), Georgia(1), UVA(1), NAU(2);
**NOTE** NAU tied New Mexico at Great America. NCAA rules break these ties for purposes of at large points. NAU beat UNM on the tie breaker and thus gains a point when UNM advances to the meet.
Round 8
Compare: Columbia(1), Clemson(1), Oh St(1), Col St(2), Georgia(1)
Analysis: Colorado State has the most points
Selection: COLORADO STATE IS IN THE MEET
Point Changes: None
Round 9
Compare: Columbia(1), Clemson(1), Oh St(1), NAU(2), Georgia(1)
Analysis: NAU has the most points
Selection: NAU IS IN THE MEET
Point Changes: CMU(3), UVA(2), Georgia(2)
Round 10
Compare: Columbia(1), UVA(2) over blocker Clemson(1), Oh St(1), Georgia(2)
Analysis: Geogia beat UVA head to head at PreNats
Selection: GEORGIA IS IN THE MEET
Point Changes: CMU(5), Mich St(2), Clemson(2), Columbia(2)
Round 11 & 12
Compare: Columbia(2), Clemson(2), Mich St(2)
Analysis: Clemson is no longer a blocker, as both they and UVA now have 2 pts. When Mich St gains their 2nd point, Ohio State became blocker of MSU.
Michigan State beat both Clemson and Columbia at PreNats.
Selection: MICHIGAN STATE PUSHES OHIO STATE INTO THE MEET
Point Changes: Miami(3), UCLA(3), Princeton(1)
Round 13
Compare: Columbia(2), Clemson(2), CMU(5), UCLA(1)
Analysis: Central Michigan has the most points
Selection: CMU IS IN THE MEET