login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A331850
as a simple table
n
a(n)
1
1
2
2
3
4
4
9
5
18
6
54
7
120
8
324
9
900
10
2406
11
6400
12
19600
13
50176
14
148042
15
442325
16
1373070
17
3954113
[1,2,4,9,18,54,120,324,900,2406,6400,19600,50176, 148042,442325,1373070,3954113]