# A149023 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 9
4 38
5 129
6 584
7 2194
8 10145
9 40267
10 189947
11 778149
12 3720871
13 15595032
14 75220900
15 320698025
16 1556317242
17 6722501137
18 32773080055
19 143032577776
20 699766105474
21 3079695882812
22 15108886597885
23 66957520453531
24 329225333017619
25 1467564548391672
26 7229091586888505
27 32385804321356430