# A000416 (b-file synthesized from sequence entry)
1 1
2 7
3 28
4 105
5 357
6 1197
7 3857
8 12300
9 38430
10 118874
11 362670
12 1095430
13 3271751
14 9673993
15 28310881
16 82033609
17 235359901
18 668779076
19 1882412994
20 5249817573
21 14510628853