# A151288 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 22
4 84
5 336
6 1392
7 5912
8 25580
9 112324
10 499312
11 2242188
12 10154664
13 46324964
14 212664488
15 981653620
16 4553218968
17 21209894268
18 99178882232
19 465362985740
20 2190341893320
21 10338437549876
22 48922967035664
23 232055129413436
24 1103080339515552
25 5253968486241476
26 25070738463476960
27 119836239979700524