# A149366 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 45
5 147
6 630
7 2379
8 10058
9 39493
10 174771
11 722360
12 3188845
13 13422230
14 60590448
15 261827778
16 1181161187
17 5155905071
18 23569271399
19 104520154563
20 477730909858
21 2131929784360
22 9829716330049
23 44325686668781
24 204387251744233
25 925589306495805
26 4294222692273509
27 19589722213545972