# A016256 (b-file synthesized from sequence entry)
0 1
1 18
2 235
3 2700
4 28981
5 298278
6 2984095
7 29253600
8 282456361
9 2695498938
10 25486623955
11 239196683700
12 2231306698141
13 20710052641998
14 191416812647815
15 1762962024789000
16 16188343910770321
17 148268580698287458
18 1355005110295423675
19 12359749064745505500