# A149326 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 38
5 143
6 527
7 1977
8 7851
9 31110
10 125198
11 515302
12 2125456
13 8872634
14 37425969
15 158422833
16 676318450
17 2903753155
18 12514755832
19 54252313270
20 236067482292
21 1030845976142
22 4519733509516
23 19873168554659
24 87648421496810
25 387702292340412
26 1719006136669141
27 7640989054526988