# A074439 (b-file synthesized from sequence entry)
1 0
2 0
3 3
4 18
5 60
6 214
7 1008
8 5280
9 29160
10 165840
11 940896
12 5196096
13 28304640
14 155270016
15 863910489
16 4861712448
17 27554100480
18 156728297088
19 892662156288
20 5088174124950
21 29045467518171
22 166186204664832
23 953309368018944
24 5481559804635648
25 31581437286776820