# A149584 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 15
4 53
5 213
6 857
7 3399
8 14237
9 61009
10 257511
11 1105689
12 4855837
13 21251923
14 93166051
15 414051993
16 1850820107
17 8249756439
18 37015249193
19 167288738749
20 755931867347
21 3420222029491
22 15562105788509
23 70993594539559
24 323752877433921
25 1480882466584885
26 6796789461958407
27 31211760727367295