# A149347 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 42
5 151
6 578
7 2213
8 8692
9 34390
10 138697
11 560620
12 2289920
13 9390621
14 38814879
15 160867961
16 670118507
17 2799480186
18 11742654551
19 49366635903
20 208158082202
21 879572305693
22 3725842253287
23 15810471546038
24 67223687535656
25 286282793431227
26 1221244261088140
27 5216874884788580