# A209904 (b-file synthesized from sequence entry)
0 1
1 6
2 36
3 186
4 891
5 3936
6 16236
7 62736
8 228411
9 786866
10 2576112
11 8045502
12 24054897
13 69070032
14 191013552
15 510099312
16 1318511727
17 3305802762
18 8055148012
19 19108956342
20 44204128413
21 99858745488
22 220591105668
23 477091381728
24 1011385901553
25 2103707920494