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 A366140 #21 Oct 04 2023 10:01:38 %S A366140 0,1,2,3,6,7,8,10,12,15,20,25,30,31,36,42,45,48,54,60,63,70,77,84,91, %T A366140 98,105,112,119,126,127,128,136,144,152,160,168,170,176,184,192,200, %U A366140 204,208,216,224,232,240,248,255,261,270,279,288,297,306,315,324,333 %N A366140 Fixed points of the binary rotations A336953 and A366139: numbers k >= 0 such that A336953(k) = A366139(k) = k. %C A366140 If a number is a fixed point of A336953, then it's also a fixed point of A366139, and vice versa. %C A366140 k is a term iff A302291(k)|k. %H A366140 Paolo Xausa, <a href="/A366140/b366140.txt">Table of n, a(n) for n = 1..10000</a> %t A366140 A366140Q[n_]:=FromDigits[RotateLeft[IntegerDigits[n,2],n],2]==n; %t A366140 Select[Range[0,500],A366140Q] %Y A366140 Cf. A302291, A336953, A366139. %K A366140 nonn,base,easy %O A366140 1,3 %A A366140 _Paolo Xausa_, Sep 30 2023