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.

A233344 Numbers k that divide the sum of their remainders modulo all smaller composites (=A233131(k)).

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%I A233344 #15 Aug 24 2021 06:28:16
%S A233344 1,2,3,4,23,53,374,613,225460,490537,1748155,3167982,9266618,12543856,
%T A233344 12589961,27359852,3418801560,8824909730,72988555402
%N A233344 Numbers k that divide the sum of their remainders modulo all smaller composites (=A233131(k)).
%C A233344 The prime terms are given by A143853.
%o A233344 (PARI) s=0; pp=0; for(n=2,10^8, p=factor(n)[,1]; s += (n-2) - pp - sigma(n) +  sum(i=1,#p,p[i]) + if(!ispseudoprime(n),n,pp++;0) + 1; if(s%n==0,print1(n,", ")) )
%Y A233344 Cf. A065132, A143853, A233131.
%K A233344 nonn,more
%O A233344 1,2
%A A233344 _Max Alekseyev_, Dec 07 2013