# A177341 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 15
4 94
5 670
6 5199
7 42879
8 370532
9 3324129
10 30770131
11 292642516
12 2851110772
13 28396320852
14 288716877223
15 2994030992113
16 31652050802267
17 341066444176593
18 3746408312358063
19 41963633210168463
20 479546389644040335