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 A366277 #6 Oct 06 2023 14:15:03 %S A366277 3,6,12,24,48,55,96,110,192,220,384,440,768,880,1536,1760,3072,3520, %T A366277 6144,7040,12288,14080,24576,28160,49152,56320,98304,112640,196608, %U A366277 225280,393216,450560,786432,901120,1572864,1802240,3145728,3604480,6291456,7208960,12582912,14417920,25165824,28835840,50331648,57671680 %N A366277 Fixed points of map n -> A366275(n). %C A366277 Equally, fixed points of map n -> A366276(n). %C A366277 If n is a term, then 2*n is also a term, and vice versa, thus the sequence is wholly determined by its odd terms: 3, 55. Are there any others? %o A366277 (PARI) isA366277(n) = (n==A366275(n)); \\ Uses also the program given in A366275. %Y A366277 Cf. A007283 (subsequence), A057889, A163511, A366275, A366276. %K A366277 nonn %O A366277 1,1 %A A366277 _Antti Karttunen_, Oct 06 2023