# A331392 (b-file synthesized from sequence entry)
1 0
2 2
3 4
4 12
5 24
6 60
7 120
8 264
9 528
10 1116
11 2232
12 4584
13 9168
14 18616
15 37232
16 75056
17 150112
18 301556
19 603112
20 1209064
21 2418128
22 4842504
23 9685008
24 19383408
25 38766816
26 77562648
27 155125296
28 310312528
29 620625056
30 1241382832
31 2482765664
32 4965813280
33 9931626560