# A174080 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 5
4 21
5 100
6 597
7 4113
8 32842
9 292379
10 2925367
11 31983248
12 383514347
13 4966286235
14 69508102006
15 1039315462467
16 16627618496319
17 282023014602100
18 5075216962675445
19 96263599713301975
20 1925002914124917950