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 A163890 #9 Jul 06 2025 14:58:08 %S A163890 1,1,2,2,6,3,3,6,6,6,3,3,6,3,6,3,1,3,3,3,1,1,2,2,4,2,2,4,4,2,4,2,4,8, %T A163890 8,4,4,2,2,4,2,2,2,2,8,8,4,4,4,4,8,8,4,2,4,2,4,8,4,8,2,2,2,2,6,6,6,6, %U A163890 12,6,6,12,12,12,6,6,18,18,18,6,3,3,6,6,6,3,3,6,6,6,3,3,6,3,6,3,9,18 %N A163890 Orbit size of n in permutation A163355. %C A163890 Will all terms of A003586 eventually appear? %H A163890 Antti Karttunen, <a href="/A163890/b163890.txt">Table of n, a(n) for n = 0..262143</a> %o A163890 (Scheme) (define (A163890 n) (let loop ((i 1) (nn (A163355 n))) (cond ((= nn n) i) (else (loop (1+ i) (A163355 nn)))))) %Y A163890 See A163891, A163892, A163894. %K A163890 nonn %O A163890 0,3 %A A163890 _Antti Karttunen_, Sep 19 2009