# A115082 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 20
4 94
5 507
6 3009
7 19350
8 132920
9 966962
10 7396366
11 59173897
12 492995320
13 4262193275
14 38125138575
15 351960913470
16 3346157796060
17 32700768584100
18 327957494280000
19 3370522049859990
20 35451669429671520
21 381183654441916290