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 A045585 #17 Oct 23 2021 10:06:32 %S A045585 1,2,34,578,4658,9826,79186,167042,638146,1346162,2839714,5109826, %T A045585 10848482,22884754,48275138,86867042,87426002,184424194,389040818, %U A045585 459469778,700046162,820677346,1476739714,1486242034,3135211298,5605479122,6613693906,7810986226,11900784754,11977362274 %N A045585 Numbers k that divide 5^k + 3^k. %t A045585 Select[Range[10^6], Divisible[PowerMod[3, #, #] + PowerMod[5, #, #], #] &] (* _Amiram Eldar_, Oct 23 2021 *) %Y A045585 Cf. A074606. %K A045585 nonn %O A045585 1,2 %A A045585 _David W. Wilson_ %E A045585 a(26)-a(30) from _Amiram Eldar_, Oct 23 2021