# A149283 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 44
5 146
6 642
7 2239
8 10080
9 37666
10 171218
11 663592
12 3053331
13 12116439
14 56196754
15 227206025
16 1059367428
17 4350268844
18 20366889356
19 84658346439
20 397770494430
21 1669447188227
22 7866672042155
23 33291883541903
24 157236375815510
25 670231722511354
26 3171728208270064
27 13602768720471067