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.

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A275479 Least positive k such that d(n) divides d(n+k) (d = A000005).

Original entry on oeis.org

1, 1, 2, 5, 1, 2, 1, 2, 3, 4, 1, 6, 1, 1, 6, 32, 1, 2, 1, 8, 1, 2, 1, 6, 3, 1, 3, 4, 1, 10, 1, 12, 1, 1, 3, 64, 1, 1, 1, 2, 1, 12, 1, 1, 5, 5, 1, 32, 1, 2, 3, 8, 1, 2, 1, 10, 1, 2, 1, 12, 1, 3, 5, 128, 1, 4, 1, 4, 1, 8, 1, 12, 1, 3, 1, 8, 1, 10, 1, 32, 31, 2, 1, 6, 1, 1, 1, 14, 1, 6, 2, 4, 1, 1, 1, 12, 1, 1, 9, 80
Offset: 1

Views

Author

Altug Alkan, Jul 29 2016

Keywords

Comments

a(A057922(n)) = 1. - Michel Marcus, Aug 01 2016

Examples

			a(10) = 4 because A000005(10) divides A000005(10+4).
		

Crossrefs

Programs

  • PARI
    a(n) = {my(k = 1); while(numdiv(n+k) % numdiv(n) != 0, k++); k; }

Extensions

Data section extended up to a(100) by Antti Karttunen, Mar 02 2023
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