# A096881 (b-file synthesized from sequence entry)
0 1
1 4
2 17
3 68
4 289
5 1156
6 4913
7 19652
8 83521
9 334084
10 1419857
11 5679428
12 24137569
13 96550276
14 410338673
15 1641354692
16 6975757441
17 27903029764
18 118587876497
19 474351505988
20 2015993900449
21 8063975601796
22 34271896307633
23 137087585230532
24 582622237229761
25 2330488948919044