# A215990 (b-file synthesized from sequence entry)
0 0
1 1
2 1
3 7
4 13
5 7
6 73
7 461
8 1721
9 7391
10 35741
11 95833
12 140902
13 7208291
14 6221977
15 738064507
16 5846167507
17 49265043007
18 440034922507
19 4152348777757
20 41275487330257
21 431068442131507
22 4718790944945257
23 27013799863651691
24 322866652557800441
25 502628413904332477