# A051376 (b-file synthesized from sequence entry)
1 0
2 0
3 3
4 134
5 1935
6 20830
7 198303
8 1776894
9 15402495
10 130890110
11 1098087903
12 9130126654
13 75412301055
14 619706950590
15 5071742430303
16 41369422556414
17 336511166127615
18 2730929153686270
19 22119108433729503
20 178853777028618174