# A149154 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 9
4 39
5 112
6 511
7 1655
8 7754
9 27061
10 128714
11 472720
12 2270366
13 8651976
14 41837362
15 163948096
16 796796614
17 3191331555
18 15570137360
19 63466080257
20 310584371757
21 1284389855918
22 6300697460577
23 26372512380003
24 129628574987488
25 548174480986494
26 2698834335089730
27 11513980004561963
28 56764309192152032