# A084262 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 28
4 188
5 1656
6 17992
7 232016
8 3460368
9 58574368
10 1109200736
11 23230928832
12 533139875776
13 13304094478208
14 358653008619648
15 10387075613199616
16 321626829363798272
17 10602925778746753536
18 370770015836513986048