# A149850 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 14
4 46
5 144
6 540
7 2008
8 7290
9 28134
10 110656
11 428810
12 1693984
13 6849592
14 27500866
15 110897284
16 455131778
17 1867725934
18 7659244962
19 31746858056
20 132117155340
21 549012909864
22 2293962286648
23 9634651916470
24 40448606439588
25 170207330110082
26 719489442018754
27 3044102473742254