# A138356 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 10
5 27
6 82
7 268
8 940
9 3476
10 13448
11 53968
12 223412
13 949535
14 4128594
15 18310972
16 82645012
17 378851428
18 1760998280
19 8288679056
20 39457907128
21 189784872428
22 921472827272
23 4512940614960
24 22279014978544
25 110797225212112