# A126340 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 28
5 245
6 2100
7 26502
8 371616
9 6565104
10 125017200
11 2888063640
12 71356079520
13 2012272702440
14 60689867021784
15 2032123676705850
16 72464991800160960
17 2806386304260520800
18 115406148262413677760