A232547 Numbers n such that sigma(n^2) mod sigma(n) = n.
7581, 988893, 1658073, 468539757, 35124206517
Offset: 1
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a(5) from Giovanni Resta, Jun 10 2016
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.
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