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 A059663 #6 Jan 07 2023 09:28:08 %S A059663 0,2,1,3,4,1,3,2,1,13,6,11,13,1,11,4,2,3,10,6,3,5,1,3,18,2,3,11,6,10, %T A059663 14,3,4,1,2,6,5,2,8,4,10,14,6,5,3,9,1,3,2,6,14,2,5,10,2,18,9,13,10,1, %U A059663 6,7,1,9,7,6,38,23,3,27,4,8,12,1,6,2,13,14,24,12,9,3,11,17,32,37,12,33 %N A059663 Positions of the flipped bits in the sequence A059459. %C A059663 E.g. starting from A059459[1] = 2, flip (set) bit 0, gives A059459[2] = 3 (= 2+2^0), then flip (set) bit 2, gives A059459[3] = 7 (3+2^2), then flip (clear) bit 1, gives A059459[4] = 5 (7-2^1), etc. %p A059663 map(floor_log_2,map(abs,DIFF(A059459))); # For floor_log_2, see A054429 %Y A059663 Cf. A054429, A059459. %K A059663 nonn %O A059663 1,2 %A A059663 _Antti Karttunen_, Feb 03 2001