# A012341 (b-file synthesized from sequence entry)
0 0
1 2
2 8
3 248
4 11328
5 1091232
6 148080000
7 30317577600
8 8228536780800
9 2957031184028160
10 1336782441018009600
11 749500660718368634880
12 508063303148296391147520
13 410659058984740631962951680