# A287090 (b-file synthesized from sequence entry)
0 1
1 1
2 10
3 46
4 191
5 740
6 2912
7 10941
8 40345
9 144703
10 509693
11 1761738
12 5993434
13 20076668
14 66329914
15 216307961
16 696990583
17 2220665661
18 7000973556
19 21853019072
20 67575353580
21 207111103623
22 629440843762
23 1897670845715
24 5677604053474
25 16863081962184
26 49736388996376
27 145714874857754