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 A362486 #10 Apr 22 2023 11:38:58 %S A362486 5,7,9,11,13,14,17,19,21,23,25,26,27,29,31,33,34,35,37,38,39,41,43,47, %T A362486 49,50,51,53,55,57,59,61,62,63,65,67,68,69,71,73,74,75,76,77,79,81,83, %U A362486 85,86,87,89,91,93,94,95,97,98,99,101,103,105,107,109,110,111 %N A362486 Infinitary nontotient numbers: values not in the range of the infinitary totient function iphi (A091732). %C A362486 Numbers k such that A091732(x) = k has no solution, i.e., A362485(k) = 0. %C A362486 Most of the odd numbers are in this sequence. Odd numbers that are not here are 1, 3, 15, 45, 255, 765, 3825, 11475, 65535, 196605, 983025, ..., which are the values of iphi at powers of 2. %H A362486 Amiram Eldar, <a href="/A362486/b362486.txt">Table of n, a(n) for n = 1..10000</a> %F A362486 A362485(a(n)) = 0. %t A362486 Select[Range[120], Length[invIPhi[#]] == 0 &] (* using the function invIPhi from A362484 *) %Y A362486 Cf. A091732, A362484, A362485. %Y A362486 Similar sequences: A005277, A005278, A347771, A362182. %K A362486 nonn %O A362486 1,1 %A A362486 _Amiram Eldar_, Apr 22 2023