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.

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).

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%I A334024 #4 Apr 12 2020 21:44:15
%S A334024 24752,101972,14257705
%N 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).
%C A334024 a(4) > 10^10.
%e A334024 24752 is a term since A334023(24752) = A334023(24753) = 33896.
%t A334024 s[n_] := DivisorSum[n, # &, #^2 > n && CoprimeQ[#, n/#] &]; Select[Range[1.5*10^7], s[#] == s[# + 1] &]
%Y A334024 Cf. A064125, A324367, A334020, A334023.
%K A334024 nonn,bref,more
%O A334024 1,1
%A A334024 _Amiram Eldar_, Apr 12 2020