login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A010561
as a simple table
n
a(n)
1
24
2
552
3
12504
4
280920
5
6280824
6
139986456
7
3113177400
8
69123011832
9
1532877910008
10
33960365608008
[24,552,12504,280920,6280824,139986456,3113177400, 69123011832,1532877910008,33960365608008]