# A112836 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 13
4 52
5 261
6 1666
7 14400
8 159250
9 2308545
10 43718544
11 1079620569
12 34863330980
13 1466458546176
14 80646187346132
15 5787269582487581
16 541901038236234048
17 66279540183479379277
18 10578427028263503488000