login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A274722
as a simple table
n
a(n)
1
1
2
6
3
68
4
1632
5
84948
6
8960464
7
1980677448
8
905233056800
9
860544738080372
10
1705630286322728068
[1,6,68,1632,84948,8960464,1980677448, 905233056800,860544738080372,1705630286322728068]