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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.

A229211 Numbers k such that Sum_{j=1..k} (j*(j+1)/2 - sigma(j))^j == 0 (mod k), where sigma(j) = A000203(j) and j*(j+1)/2 - sigma(j) = A024816(j).

Table of values

n a(n)
1 1
2 2
3 9
4 78
5 3205
6 5589
7 14153
8 246123

List of values

[1, 2, 9, 78, 3205, 5589, 14153, 246123]

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

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