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A217590
as a simple table
n
a(n)
1
4
2
9
3
25
4
68
5
196
6
581
7
1731
8
5180
9
15534
10
46579
11
139713
12
419116
13
1257320
[4,9,25,68,196,581,1731,5180,15534,46579,139713, 419116,1257320]
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Last modified July 18 01:34 EDT 2024. Contains 374377 sequences. (Running on oeis4.)
