cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A127100 Numbers k such that k^2 divides 10^k-1.

Table of values

n a(n)
1 1
2 3
3 9
4 111
5 333
6 3003003
7 111111111
8 225121209
9 675363627
10 27486820443
11 32119664517
12 82460461329
13 24048075051027
14 90180273183093
15 225346555330209
16 889778776887999
17 3336670107774441
18 10717272100393839
19 19885751580714849
20 27514334750263443

List of values

[1, 3, 9, 111, 333, 3003003, 111111111, 225121209, 675363627, 27486820443, 32119664517, 82460461329, 24048075051027, 90180273183093, 225346555330209, 889778776887999, 3336670107774441, 10717272100393839, 19885751580714849, 27514334750263443]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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