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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A334024 Numbers k such that s(k) = s(k+1), where s(k) is the sum of unitary divisors of k that are larger than sqrt(k) (A334023).

Original entry on oeis.org

24752, 101972, 14257705
Offset: 1

Views

Author

Amiram Eldar, Apr 12 2020

Keywords

Comments

a(4) > 10^10.

Examples

			24752 is a term since A334023(24752) = A334023(24753) = 33896.
		

Crossrefs

Programs

  • Mathematica
    s[n_] := DivisorSum[n, # &, #^2 > n && CoprimeQ[#, n/#] &]; Select[Range[1.5*10^7], s[#] == s[# + 1] &]
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