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 A045596 #28 Jul 28 2025 05:38:48 %S A045596 1,2,3,9,27,39,74,81,117,243,351,507,729,1053,1521,2187,2738,3081, %T A045596 3159,4563,6123,6561,6591,9243,9477,12207,13689,18369,19683,19773, %U A045596 27729,28431,36621,40053,41067,43882,55107,59049,59319,79599,83187,85293 %N A045596 Numbers k that divide 7^k + 5^k. %H A045596 Harvey P. Dale, <a href="/A045596/b045596.txt">Table of n, a(n) for n = 1..141</a> (All terms up to 10^7) %t A045596 Select[Range[86000],Mod[PowerMod[7,#,#]+PowerMod[5,#,#],#]==0&] (* _Harvey P. Dale_, Aug 02 2023 *) %Y A045596 Cf. A074616. %K A045596 nonn %O A045596 1,2 %A A045596 _David W. Wilson_