# A028187 (b-file synthesized from sequence entry)
0 1
1 33
2 692
3 11790
4 178311
5 2498643
6 33230002
7 425666400
8 5302894421
9 64673833653
10 775796369712
11 9184400635410
12 107582646828931
13 1249287573291063
14 14403306409895822
15 165064341717134820
16 1882103404758557841
17 21367906210495206873
18 241700345807807504332