# A149460 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 13
4 50
5 205
6 866
7 3749
8 16632
9 75039
10 341961
11 1576018
12 7327168
13 34283739
14 161361590
15 763453145
16 3627427677
17 17298560102
18 82772495282
19 397211322958
20 1910994001127
21 9215181362223
22 44529823106164
23 215576405905591
24 1045404537941408
25 5077352560496235
26 24694338511964747
27 120257935938127480