# A026071 (b-file synthesized from sequence entry)
4 1
5 3
6 12
7 40
8 133
9 427
10 1352
11 4224
12 13080
13 40216
14 122980
15 374452
16 1136226
17 3438150
18 10380048
19 31279728
20 94114125
21 282804759
22 848886180
23 2545759328
24 7628718845
25 22845628531
26 68377674280
27 204560102800
28 611720539235
29 1828673918721