# A149132 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 9
4 34
5 105
6 401
7 1395
8 5432
9 20045
10 79267
11 302963
12 1214290
13 4751129
14 19259900
15 76675769
16 313691094
17 1265724443
18 5216819041
19 21274180331
20 88222413102
21 362852198453
22 1512559985116
23 6264650550167
24 26232187216204
25 109283578439325
26 459413741766929
27 1923456569744013
28 8114071138587298