# A025248 (b-file synthesized from sequence entry)
1 1
2 0
3 2
4 2
5 2
6 6
7 14
8 26
9 58
10 142
11 326
12 754
13 1826
14 4438
15 10750
16 26378
17 65354
18 162334
19 405046
20 1016546
21 2561074
22 6472550
23 16415086
24 41761786
25 106526810
26 272411054
27 698275622
28 1793763282
29 4617047618
30 11906277750
31 30757124830
32 79582907370
33 206231537770