# A143562 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 17
4 105
5 481
6 3261
7 16801
8 119697
9 656129
10 4819061
11 27447601
12 205776121
13 1202943457
14 9152680109
15 54524185409
16 419491297313
17 2534963932417
18 19673179986661
19 120224135048273
20 939543098579081
21 5793676726569697