# A149266 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 40
5 145
6 557
7 2204
8 8878
9 36670
10 153158
11 649421
12 2779083
13 12009927
14 52301065
15 229322103
16 1011602788
17 4485941698
18 19989047298
19 89445085086
20 401786301272
21 1811068535817
22 8189394966213
23 37138317913733
24 168865708226573
25 769695000793202
26 3516190063129191
27 16096483440690982