# A351756 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 23
4 119
5 709
6 4749
7 35031
8 281271
9 2438565
10 22673021
11 224739303
12 2363075191
13 26246762213
14 306830932749
15 3763323446487
16 48292462190743
17 646763208308421
18 9020009372203965
19 130737162573013159
20 1965798562640921879
21 30613694640191725381