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 A015773 #14 Nov 05 2019 06:56:17 %S A015773 1,2,3,6,22,33,66,118,177,354,454,750,1298,1362,1372,1947,3894,4116, %T A015773 4994,8706,14982,15092,26786,33906,44250,45276,56750,65542,77858, %U A015773 80358,98961,116787,170250,171500,196626,197922,233574,242844 %N A015773 Numbers k such that phi(k) | sigma_14(k). %C A015773 sigma_14(k) is the sum of the 14th powers of the divisors of k. %H A015773 Amiram Eldar, <a href="/A015773/b015773.txt">Table of n, a(n) for n = 1..360</a> %t A015773 Select[Range[250000],Divisible[DivisorSigma[14,#],EulerPhi[#]]&] (* _Harvey P. Dale_, Feb 02 2019 *) %Y A015773 Cf. A000010, A013962. %Y A015773 Cf. A020492, A015759, A015761, A015762, A015763, A015764, A015765, A015766, A015767, A015768, A015769, A015770, A015771, A015774, A094470. %K A015773 nonn %O A015773 1,2 %A A015773 _Robert G. Wilson v_