# A026080 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 7
4 22
5 64
6 191
7 567
8 1689
9 5033
10 15013
11 44809
12 133816
13 399802
14 1194949
15 3572693
16 10684758
17 31962456
18 95633229
19 286193409
20 856610214
21 2564317356
22 7677475521
23 22988860305
24 68843627049
25 206183053485
26 617563017927
27 1849887488987