# A149720 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 17
4 73
5 295
6 1347
7 5829
8 27169
9 121841
10 576633
11 2652903
12 12656631
13 59103899
14 284233127
15 1342659713
16 6487766429
17 30900283921
18 149947936161
19 718950320529
20 3499340747057
21 16862097275321
22 82299640491665
23 398234447965951
24 1947714354753959
25 9456179522175335
26 46335746276135371
27 225604006948847023