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 A277823 #12 Jun 30 2022 08:39:41 %S A277823 3,6,9,12,23,18,29,24,43,46,33,36,63,58,53,48,83,86,89,92,71,66,77,72, %T A277823 123,126,113,116,111,106,101,96,163,166,169,172,183,178,189,184,139, %U A277823 142,129,132,159,154,149,144,243,246,249,252,231,226,237,232,219,222,209,212,207,202,197,192,323,326,329,332,343,338,349,344,363,366,353 %N A277823 a(n) = A048724(A065621(n)). %H A277823 Antti Karttunen, <a href="/A277823/b277823.txt">Table of n, a(n) for n = 1..8192</a> %H A277823 <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a> %F A277823 a(n) = A048724(A065621(n)). %F A277823 a(n) = A277320(n,3) = A048720(A065621(n),3). %o A277823 (Scheme) %o A277823 (define (A277823 n) (A048724 (A065621 n))) %o A277823 (define (A277823 n) (A048720bi (A065621 n) 3)) %o A277823 (define (A277823 n) (A277320bi n 3)) %o A277823 (Python) %o A277823 def A277823(n): return (m:=n^ (n&~-n)<<1)^m<<1 # _Chai Wah Wu_, Jun 29 2022 %Y A277823 Cf. A048720, A065621. %Y A277823 Column 2 of A277820. %Y A277823 Column 3 of A277320. %K A277823 nonn,base %O A277823 1,1 %A A277823 _Antti Karttunen_, Nov 01 2016