# A050182 (b-file synthesized from sequence entry)
0 0
1 1
2 3
3 12
4 40
5 143
6 497
7 1768
8 6288
9 22610
10 81686
11 297160
12 1086384
13 3991995
14 14732005
15 54587280
16 202995232
17 757398510
18 2834502346
19 10637507400
20 40023606896
21 150946230006
22 570534474698
23 2160865067312
24 8199711007200