# A215507 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 56
4 661
5 9141
6 142522
7 2448544
8 45653707
9 913964706
10 19491269046
11 440154262428
12 10475920613965
13 261802864005533
14 6848792691398646
15 187061918111607286
16 5322557388634585229
17 157460119081722965460
18 4834825995463338092669
19 153840302781842431823086