# A097121 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 1
4 5
5 17
6 41
7 81
8 157
9 337
10 785
11 1825
12 4085
13 8913
14 19449
15 42993
16 95885
17 213777
18 474465
19 1049921
20 2323685
21 5150865
22 11429321
23 25358737
24 56233853
25 124658129
26 276348849
27 612740961
28 1358769877
29 3013068113
30 6681031065
31 14813622577