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A031991
as a simple table
n
a(n)
1
2
2
13
3
107
4
1069
5
10247
6
102367
7
1023487
8
10235749
9
102346897
[2,13,107,1069,10247,102367,1023487,10235749, 102346897]
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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)
