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 A221262 #13 Jul 16 2021 20:02:01 %S A221262 1056331752,1061905992,1823140011,3564162938,3667843058,3722593056, %T A221262 3754042656,5732483592,5836959090,6021989960,6260277320,8433473570, %U A221262 8799421778,8845856138,9976235103,10655560968,12961358020,13736556801,14606220127,19398086442,24066143955,24746856018,28520952292 %N A221262 Numbers k such that sigma(k) is the fourth power of the sum of the prime divisors of k. %H A221262 Robert Gerbicz, <a href="/A221262/b221262.txt">Table of n, a(n) for n = 1..10000</a> %e A221262 1056331752 = 2^3*3*7*19*59*71*79 and sigma(1056331752) = (2+3+7+19+59+71+79)^4. %Y A221262 Cf. A187771 sigma(k)=sopf(k)^3, A221263 sigma(k)=sopf(k)^5. %K A221262 nonn %O A221262 1,1 %A A221262 _Giovanni Resta_, Jan 07 2013