# A149488 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 14
4 51
5 201
6 823
7 3436
8 14575
9 62776
10 273766
11 1204282
12 5337100
13 23810913
14 106823537
15 481534000
16 2179638646
17 9902272921
18 45133705547
19 206310531515
20 945515644303
21 4343445670182
22 19995082395510
23 92225885065701
24 426139227741927
25 1972226545914777
26 9141415516033028
27 42429942858806258