# A259276 (b-file synthesized from sequence entry)
0 1
1 6
2 30
3 186
4 1110
5 6630
6 39846
7 239010
8 1433910
9 8603790
10 51622446
11 309733890
12 1858404990
13 11150428470
14 66902565630
15 401415404586
16 2408492418870
17 14450954480790
18 86705726950470
19 520234361647890
20 3121406169699270
21 18728437018590366
22 112370622111206670
23 674223732666113010