# A121564 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 18
4 288
5 180000
6 1620000
7 190591380000
8 780662292480000
9 46097327708651520000
10 28810829817907200000000
11 747278726094210559615027200000000
12 747278726094210559615027200000000
13 17410163370762081276553474535120146483200000000