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A118639
as a simple table
n
a(n)
1
1
2
4
3
9
4
40
5
90
6
400
7
900
8
4000
9
9000
10
40000
11
90000
12
400000
13
900000
[1,4,9,40,90,400,900,4000,9000,40000,90000,400000, 900000]
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Last modified July 21 02:16 EDT 2024. Contains 374462 sequences. (Running on oeis4.)
