# A009284 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 10
4 32
5 128
6 616
7 3424
8 21632
9 152000
10 1179904
11 9986560
12 91734656
13 906835712
14 9609378304
15 108540031744
16 1302286401536
17 16533214773248
18 221420625719296
19 3119382193635328
20 46106240358318080
21 713450250644701184
22 11531738694322683904
23 194362558120600797184