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 A262464 #12 Sep 24 2015 04:44:21
%S A262464 1,6,15,30,60,90,140,264,308,440,528,760,870,1305,1740,2436,2610,3480,
%T A262464 4060,5220,6786,6960,7830,12180,13806,14160,15930,19488,24030,28320,
%U A262464 29264,34515,35400,39648,50976,55224,63720,66080,69030,74340,87792,96642,115104,122080,127530,143880
%N A262464 Indices of rows of triangle A262432 where the maximum term of the row is a new record.
%H A262464 Michel Marcus, <a href="/A262464/b262464.txt">Table of n, a(n) for n = 1..127</a>
%e A262464 After row 1 which is [1], the next maximum 2 occurs at row 6 which is [2, 1, 1, 1, 1, 0].
%o A262464 (PARI) lista(nn) = {m = 0; vc = vector(nn); for (n=1, nn, d = denominator(sigma(n,-1)); vc[d]++; if (vc[d] > m, print1(n, ", "); m = vc[d]););}
%Y A262464 Cf. A262432.
%K A262464 nonn
%O A262464 1,2
%A A262464 _Michel Marcus_, Sep 23 2015