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 A277825 #14 Jun 30 2022 08:39:45 %S A277825 5,10,27,20,57,54,39,40,125,114,99,108,65,78,95,80,245,250,235,228, %T A277825 201,198,215,216,141,130,147,156,177,190,175,160,485,490,507,500,473, %U A277825 470,455,456,413,402,387,396,417,430,447,432,277,282,267,260,297,294,311,312,365,354,371,380,337,350,335,320,965,970,987,980,1017,1014,999,1000 %N A277825 a(n) = A048725(A065621(n)) = A048720(A065621(n),5). %H A277825 Antti Karttunen, <a href="/A277825/b277825.txt">Table of n, a(n) for n = 1..8192</a> %H A277825 <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a> %F A277825 a(n) = A048724(A277823(n)) = A048725(A065621(n)). %F A277825 a(n) = A048720(A065621(n),5). %o A277825 (Scheme) %o A277825 (define (A277825 n) (A048724 (A277823 n))) %o A277825 (define (A277825 n) (A048720bi (A065621 n) 5)) ;; For A048720bi see the Scheme-program attachment in A048720. %o A277825 (Python) %o A277825 def A277825(n): return (m:=n^ (n&~-n)<<1)^m<<2 # _Chai Wah Wu_, Jun 29 2022 %Y A277825 Column 3 of A277820, Column 5 of A277320. %Y A277825 Cf. A048720, A048724, A048725, A065621, A277823. %K A277825 nonn,base %O A277825 1,1 %A A277825 _Antti Karttunen_, Nov 02 2016