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 A055715 #36 Feb 19 2024 10:28:00
%S A055715 1,6,28,120,402,496,644,672,920,1366,1608,1932,2680,2760,3417,3966,
%T A055715 4098,4623,4975,5152,6210,6834,8040,8128,8280,9246,9528,9950,12294,
%U A055715 13668,15008,15456,15864,16392,18492,19900,24120,24840,25954,27320,27336,29850,30240,32760
%N A055715 Numbers k such that k | sigma_11(k).
%C A055715 sigma_11(k) is the sum of the 11th powers of the divisors of k (A013959).
%H A055715 Amiram Eldar, <a href="/A055715/b055715.txt">Table of n, a(n) for n = 1..10000</a>
%t A055715 Do[If[Mod[DivisorSigma[11, n], n]==0, Print[n]], {n, 1, 40000}]
%o A055715 (PARI) isok(k) = (sigma(k, 11) % k) == 0; \\ _Michel Marcus_, Nov 09 2019
%Y A055715 Cf. A013959.
%Y A055715 Cf. A007691, A046762, A046763, A046764, A055709, A055710, A055711, A055712, A055713, A055714.
%K A055715 nonn
%O A055715 1,2
%A A055715 _Robert G. Wilson v_, Jun 09 2000
%E A055715 a(37)-a(40) corrected and more terms added by _Amiram Eldar_, Nov 09 2019