# A038158 (b-file synthesized from sequence entry)
0 0
1 0
2 0
3 3
4 18
5 100
6 615
7 4326
8 34636
9 311760
10 3117645
11 34294150
12 411529866
13 5349888336
14 74898436795
15 1123476552030
16 17975624832600
17 305585622154336
18 5500541198778201
19 104510282776785990
20 2090205655535719990
21 43894318766250120000