login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A053294
as a simple table
n
a(n)
0
1
1
1
2
2
3
9
4
170
5
57978
6
6722955416
7
90396259057770600841
8
16342967303279146791599896178138243550346
[1,1,2,9,170,57978,6722955416, 90396259057770600841, 16342967303279146791599896178138243550346]