# A012375 (b-file synthesized from sequence entry)
0 1
1 2
2 24
3 670
4 33320
5 2585578
6 288966436
7 44079504222
8 8829945884336
9 2255967459804498
10 718404622768739004
11 279841132618425752966
12 131251206110226657893896
13 73120300314496783663622266