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.

A231369 Numbers n such that antisigma(x) = n has no solution, where antisigma(m) = A024816(m) = the sum of the nondivisors of m that are between 1 and m.

Original entry on oeis.org

1, 4, 5, 6, 7, 8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 34, 35, 36, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75
Offset: 1

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Author

Jaroslav Krizek, Nov 09 2013

Keywords

Comments

Complement of A231368.
Numbers n such that A231367(n) = A231366(n) = 0.

Crossrefs

Cf.: A007369 (numbers n such that sigma(x) = n has no solution), A024816, A231365, A231366, A231367, A231368.