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 A290846 #14 Jul 23 2021 02:07:03 %S A290846 1,4182,4879,122664360,315870765,4621320120,5006430130,20245909880, %T A290846 220899101736,239307360214,812593845485 %N A290846 Numbers k such that sum of squares of divisors of k is a cube. %C A290846 It is known that A006532 is an infinite sequence. Is this sequence infinite? %C A290846 a(12) > 10^12. - _Giovanni Resta_, Aug 14 2017 %H A290846 Giovanni Resta, <a href="/A290846/a290846.txt">A list of 3110 terms > 10^12</a> %e A290846 4879 is a term because 1^2 + 7^2 + 17^2 + 41^2 + 119^2 + 287^2 + 697^2 + 4879^2 = 290^3. %o A290846 (PARI) isok(n) = ispower(sigma(n, 2), 3); %Y A290846 Cf. A001157, A006532, A046655. %K A290846 nonn,more %O A290846 1,2 %A A290846 _Altug Alkan_, Aug 12 2017 %E A290846 a(6)-a(11) from _Giovanni Resta_, Aug 14 2017