# A151213 (b-file synthesized from sequence entry)
0 1
1 3
2 13
3 55
4 251
5 1141
6 5335
7 24963
8 118375
9 562375
10 2691437
11 12906257
12 62168991
13 300007995
14 1452102449
15 7039558679
16 34199832655
17 166374726507
18 810680032585
19 3954666188643
20 19315989851281
21 94438597716433
22 462193556366483
23 2263932123478525
24 11098618726962151
25 54449006317549851
26 267313107439106905