# A177476 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 20
5 83
6 402
7 2245
8 14192
9 100650
10 792508
11 6859260
12 64772648
13 662630653
14 7301841444
15 86212535179
16 1085834949064