# A251594 (b-file synthesized from sequence entry)
0 1
1 1
2 7
3 240
4 21720
5 3371661
6 753384764
7 221280081152
8 8057098267140
9 34901583348508312
10 17450751376913065040
11 9843352171270598267648
12 6153355867118768196316096
13 4203420758907186950461719325
14 3102284883642894954937435310820