# A343697 (b-file synthesized from sequence entry)
1 1
2 4
3 144
4 331776
5 26011238400
6 660727073341440000
7 3779719071732351369216000000
8 11832225237539469009819996424230666240000
9 30522879094287825948996777484664523152536511038095360000
10 99649061600109839440372937690884668992908741561885362729330828902400000000