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.
%I A279091 #17 Nov 02 2017 15:51:09
%S A279091 1,27720,50400,55440,83160,110880,166320,221760,277200,332640,360360,
%T A279091 443520,471240,498960,554400,655200,665280,720720,942480,1053360,
%U A279091 1081080,1330560,1413720,1441440,1663200,1801800,1884960,2106720,2162160,2827440,2882880,3326400
%N A279091 Numbers k for which sigma(k) - 4k exceeds sigma(j) - 4j for all j < k.
%C A279091 Does lcm(1..10) = 2520 divide a(n) for all n > 1?
%C A279091 Does lcm(1..11) = 27720 divide a(n) for all n except 1, 3, and 16?
%H A279091 Michel Marcus, <a href="/A279091/b279091.txt">Table of n, a(n) for n = 1..77</a>
%e A279091 50400 is in the sequence because sigma(50400) - 4*50400 = 203112 - 201600 = 1512, and no k < 50400 has a value of sigma(k) - 4k this large.
%o A279091 (PARI) lista(nn) = {m = -oo; k = 0; for (n=1, nn, if ((nm = (sigma(n) - 4*n)) > m, k++; print1(n, ", "); m = nm););} \\ _Michel Marcus_, Nov 02 2017
%Y A279091 Cf. A034090, A140522, A279088: with 1, 2 and 3 instead of 4.
%K A279091 nonn
%O A279091 1,2
%A A279091 _Jon E. Schoenfield_, Jan 30 2017