# A047136 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 14
4 56
5 188
6 639
7 2206
8 8485
9 31278
10 114960
11 423612
12 1621969
13 6160764
14 23359289
15 88603820
16 341015446
17 1312635338
18 5052259362
19 19452272144
20 75341562629
21 292245458188
22 1134351244952
23 4405229026674
24 17153557736343