# A149325 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 38
5 142
6 517
7 1951
8 7513
9 29512
10 117109
11 467749
12 1895238
13 7712705
14 31588149
15 130133561
16 538672492
17 2239216530
18 9339478963
19 39101989768
20 164180421600
21 691191046990
22 2917387518861
23 12341734663057
24 52320417953755
25 222221908195725
26 945574242636011
27 4030163887084767