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.

A353541 Starts of runs of 5 consecutive numbers whose abundancy index is larger than Pi^2/6.

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%I A353541 #9 Apr 26 2022 04:49:02
%S A353541 330921744,4810639922,5851774772,7352078822,7453434624,9289182174,
%T A353541 13353118622,13640815824,14009147072,14294291372,14595483174,
%U A353541 14711699274,17516524022,17999693072,21640033412,21997704572,22174683684,24521431022,24815902472,25362139074,25826980022
%N A353541 Starts of runs of 5 consecutive numbers whose abundancy index is larger than Pi^2/6.
%H A353541 Amiram Eldar, <a href="/A353541/b353541.txt">Table of n, a(n) for n = 1..26</a>
%e A353541 330921744 is a term since sigma(330921744)/330921744 = 2.583..., sigma(330921745)/330921745 = 1.671..., sigma(330921746)/330921746 = 1.647..., sigma(330921747)/330921747 = 1.663... and sigma(330921748)/330921748 = 1.762... are all larger than Pi^2/6 = 1.644... .
%Y A353541 Cf. A000203, A013661.
%Y A353541 Subsequence of A353537, A353538, A353539 and A353540.
%K A353541 nonn
%O A353541 1,1
%A A353541 _Amiram Eldar_, Apr 25 2022