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 A222712 #19 Aug 02 2019 03:42:49 %S A222712 1,2,4,6,8,24,48,72,120,192,240,336,720,960,1440,1872,2016,2880,3360, %T A222712 4032,5760,6720,6912,7392,8640,10080,17280,20160,34560,40320,44352, %U A222712 60480,69120,74880,95040,96768,100800,120960,134784,201600,241920,322560,354816,411840,483840 %N A222712 Record values of gcd(sigma(n), phi(n)) (A009223). %C A222712 RECORDS transform of A009223. %H A222712 Donovan Johnson, <a href="/A222712/b222712.txt">Table of n, a(n) for n = 1..500</a> %H A222712 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> (The RECORDS transform returns both the high-water marks and the places where they occur). %o A222712 (PARI) mg=0;for(x=1,1000000,g=A009223(x);if(g>mg,print1(g", ");mg=g)) %Y A222712 Cf. A009223, A222711 (indexes where these records are attained). %K A222712 nonn %O A222712 1,2 %A A222712 _Phil Carmody_, Mar 01 2013