# A012754 (b-file synthesized from sequence entry)
0 1
1 2
2 12
3 280
4 13328
5 1016608
6 120249536
7 19735743872
8 4349101334784
9 1233253332705792
10 437938810884459520
11 190333673674118699008
12 99369086035110941036544
13 61369835997419856216006656