# A149013 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 35
5 116
6 500
7 1860
8 8288
9 33222
10 151006
11 634144
12 2927959
13 12686672
14 59289782
15 262829326
16 1239619599
17 5592148566
18 26562347627
19 121489768762
20 580326142766
21 2683779258274
22 12878825133211
23 60098900650217
24 289507169955153
25 1361099053157427
26 6577911281816518
27 31119637635957412