# A090032 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 10
4 26
5 66
6 171
7 440
8 1112
9 2786
10 6820
11 16720
12 41106
13 100856
14 245793
15 597030
16 1441292
17 3469486
18 8304526
19 19832076
20 47110238
21 111669014