# A149957 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 16
4 52
5 182
6 669
7 2504
8 9698
9 38195
10 152767
11 621076
12 2549560
13 10581714
14 44310835
15 186883460
16 794030970
17 3393309246
18 14581119513
19 62974335852
20 273154359474
21 1189789622673
22 5201720413303
23 22819093413662
24 100426881360373
25 443259890866905
26 1961797012311293
27 8704741535659198