# A237993 (b-file synthesized from sequence entry)
0 1
1 2
2 274
3 118124
4 105258076
5 159721605680
6 369012649234384
7 1206647803780373360
8 5304713715525445812976
9 30180059720580991603896800
10 215760462268683520394805979744
11 1893448925578239663637174767335168
12 20012008248418194052035539503977759232