# A149337 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 40
5 149
6 560
7 2135
8 8353
9 33257
10 133224
11 538665
12 2199354
13 9031105
14 37260077
15 154539062
16 643804334
17 2691018641
18 11284671195
19 47469498047
20 200204187669
21 846321739136
22 3585638242781
23 15222351020829
24 64741345044361
25 275813618292348
26 1176907917474103
27 5029259393788288