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 A249016 #11 Nov 11 2024 22:22:57 %S A249016 1,2,3,5,13,17,21,23,33,42,43,56,57,75,84,99,101,105,109,119,133,139, %T A249016 157,162,163,182,183,207,208,219,220,255,257,263,267,303,305,307,315, %U A249016 340,341,343,383,385,387,397,411,420,421,423,469,483,485,489,505,519,523,547,552,553,581,602,603,609,618 %N A249016 Indices of records in A055460 (number of primes dividing the squarefree part of n!). %H A249016 Max Alekseyev, <a href="/A249016/b249016.txt">Table of n, a(n) for n = 1..38282</a> %o A249016 (PARI) np=vector(10^6); b=-1; r=0; for(n=1, 10^6, f=factor(n); for(i=1, matsize(f)[1], if(f[i, 2]%2, r += (-1)^np[f[i, 1]]; np[f[i, 1]]=1-np[f[i, 1]]; )); if(r>b, b=r; print1(n, ", "))) %Y A249016 Cf. A249017 (values of records), A055204 %K A249016 nonn %O A249016 1,2 %A A249016 _Max Alekseyev_, Oct 19 2014