# A276356 (b-file synthesized from sequence entry)
1 0
2 1
3 3
4 30
5 480
6 12000
7 430920
8 21052080
9 1343381760
10 108519626880
11 10825535952000
12 1307042125804800
13 187849403155814400
14 31691651643235584000
15 6201948133744691328000
16 1393497414722424211200000
17 356287752381703180566528000
18 102850159977463464656842752000