# A137990 (b-file synthesized from sequence entry)
0 2
1 7
2 19
3 109
4 163
5 487
6 1459
7 17497
8 52489
9 39367
10 472393
11 4960117
12 5314411
13 102036673
14 19131877
15 57395629
16 86093443
17 258280327
18 3874204891
19 23245229341
20 90656394427
21 585779779369
22 251048476873
23 9790890598009
24 4518872583697