# A149422 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 56
5 208
6 996
7 4078
8 19847
9 86165
10 422862
11 1903766
12 9391229
13 43308943
14 214368865
15 1005327565
16 4987734204
17 23678524804
18 117672616437
19 563791036407
20 2805257695526
21 13536119727544
22 67414254046586
23 327111783619820
24 1630286325643540
25 7945974905609362
26 39623933066496998
27 193826942329261434