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 A036446 #16 Jul 21 2025 16:49:30 %S A036446 1,3,4,6,8,9,12,13,17,19,21,25,29,31,37,41,43,45,46,49,51,53,55,57,58, %T A036446 61,65,69,70,71,77,81,82,85,89,91,93,97,99,101,103,105,109,111,113, %U A036446 114,115,117,118,121,125,127,130,131,133,134,137,139,141,142,145,149,151 %N A036446 Not of form sigma(k) - phi(k). %H A036446 Robert Israel, <a href="/A036446/b036446.txt">Table of n, a(n) for n = 1..5510</a> (terms <= 10000) %Y A036446 Complement of A112730. %Y A036446 Cf. A000010, A000203, A051612. %K A036446 nonn %O A036446 1,2 %A A036446 _David W. Wilson_