# A012957 (b-file synthesized from sequence entry)
0 1
1 4
2 40
3 934
4 39064
5 2572314
6 247234332
7 33003190406
8 5905698391952
9 1378247307547506
10 409930747848171812
11 152227803027302287806
12 69261955789532321824024
13 37950380064596445532181866