# A153292 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 31
4 211
5 1516
6 11295
7 86423
8 675051
9 5361323
10 43171480
11 351709926
12 2894115003
13 24022408477
14 200918146461
15 1691749323232
16 14329850844625
17 122028162988698
18 1044131083377287
19 8972696721635997
20 77408293908402336