# A025986 (b-file synthesized from sequence entry)
0 1
1 20
2 257
3 2704
4 25389
5 221676
6 1841449
7 14758568
8 115171397
9 880623172
10 6627177921
11 49248518592
12 362296167325
13 2643446894108
14 19158543110873
15 138087153497176
16 990728497913973
17 7081081591668084