# A177780 (b-file synthesized from sequence entry)
1 1
2 4
3 60
4 2496
5 276240
6 83893248
7 72508524480
8 182341191057408
9 1348995112077074688
10 29528107099434111467520
11 1918583757808453356238126080
12 370812729559366641806998574727168