# A002672 (b-file synthesized from sequence entry)
1 1
2 8
3 1920
4 193536
5 154828800
6 1167851520
7 892705701888000
8 1428329123020800
9 768472460034048000
10 4058540589291090739200
11 196433364521688791777280000
12 5957759187690780937420800000
13 30447485794244997427545243648000000
14 341011840895543971188506728857600000