# A024287 (b-file synthesized from sequence entry)
0 0
1 1
2 8
3 196
4 10688
5 937936
6 113552768
7 17875345216
8 3555171842048
9 875294104443136
10 261970132442851328
11 93711886717539460096
12 39452759032211774455808
13 19284289193322067327799296