# A367838 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 38
4 344
5 3832
6 51408
7 803952
8 14371456
9 289005440
10 6457624832
11 158719896832
12 4255775425536
13 123619815742464
14 3867071262472192
15 129610289219999744
16 4633674344869756928
17 176011269522607144960
18 7079115958438736363520