# A163572 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 7
4 19
5 39
6 169
7 765
8 2183
9 4131
10 11561
11 55157
12 666381
13 8175433
14 68536455
15 355280675
16 1048740623
17 1931107235
18 5055100985
19 13108206741
20 38734589993
21 143320957605
22 1022112572635
23 26523801989399
24 914332703582521