# A149991 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 17
4 57
5 207
6 770
7 2928
8 11385
9 44761
10 178507
11 717723
12 2911567
13 11889471
14 48843018
15 201708227
16 836728300
17 3485203920
18 14568180657
19 61093715901
20 256943318442
21 1083492074350
22 4579868091028
23 19401361515390
24 82354213479878
25 350222446183284
26 1491926082298429
27 6365617368220411