# A177615 (b-file synthesized from sequence entry)
0 1
1 1
2 20
3 1680
4 369600
5 168168000
6 137127810959
7 182138398520387
8 367988956112888200
9 1074073326771101149080
10 4350318942513425384777400
11 23673963203663687592089088600
12 168569155472096397352266896207243
13 1536148007688582239667327040442799059