# A005552 (b-file synthesized from sequence entry)
4 4
5 35
6 166
7 633
8 2276
9 8107
10 29086
11 105460
12 386320
13 1428664
14 5327738
15 20014741
16 75677726
17 287784832
18 1099944240
19 4223170456
20 16280541834
21 62992268833
22 244536402984
23 952154191644
24 3717618386556
25 14551788319328