# A036068 (b-file synthesized from sequence entry)
0 1
1 6
2 30
3 135
4 567
5 2268
6 8748
7 32805
8 120285
9 433026
10 1535274
11 5373459
12 18600435
13 63772920
14 216827928
15 731794257
16 2453663097
17 8178876990
18 27119434230
19 89494132959
20 294052151151
21 962352494676
22 3138105960900
23 10198844372925