# A037127 (b-file synthesized from sequence entry)
0 1
1 3
2 7
3 21
4 67
5 219
6 669
7 2075
8 6307
9 19175
10 58027
11 175119
12 527361
13 1586139
14 4766587
15 14316141
16 42981211
17 129009125
18 387158355
19 1161737235
20 3485735833
21 10458256107
22 31376865309
23 94134790251
24 282412759267
25 847255055025
26 2541798719467
27 7625463267275