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 A175426 #12 Jan 20 2022 18:16:41 %S A175426 25,26,35,36,125,126,135,136,215,216,315,316,1125,1126,1135,1136,1215, %T A175426 1216,1315,1316 %N A175426 Starting values for which iteration of the map x->A175420(x) never reaches a single-digit value. %C A175426 Arguments m such that A175424(m) = -1. Complement of A175427. %e A175426 26 is in the sequence because starting with 26 the iterations enter a cycle of 2- and 3-digit numbers: 6^2 = 36, 6^3 = 216, (6^1)^2 = 36, 6^3 = 216, (6^1)^2 = 36, ... %Y A175426 Cf. A175419, A175420, A175421, A175422, A175423, A175424, A175425, A175427. %K A175426 nonn,base,more %O A175426 1,1 %A A175426 _Jaroslav Krizek_, May 09 2010