# A121285 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 4
4 10
5 22
6 54
7 120
8 284
9 626
10 1438
11 3136
12 7044
13 15212
14 33596
15 71952
16 156856
17 333610
18 719886
19 1522224
20 3257972
21 6855476
22 14574772
23 30541264
24 64571400
25 134827252
26 283727564
27 590608960
28 1237926184
29 2569953496
30 5368225848
31 11118205088
32 23155034480
33 47856472218