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 A321043 #38 Apr 30 2025 14:46:14 %S A321043 1,2,4,8,6,3,5,0,9,7,16,32,64,12,28,25,56,51,10,24,20,48,40,96,81,19, %T A321043 92,63,38,84,27,76,68,65,55,53,36,13,31,72,26,62,21,14,44,52,42,88,85, %U A321043 57,97,71,15,41,94,43,30,83,86,60,67,77,33,35,54,34,17,45 %N A321043 Single-digit numbers in the order in which they first appear in the decimal expansions of powers of 2, followed by the two-digit numbers in the order in which they appear, then the three-digit numbers, and so on. %C A321043 Apparently this algorithm applied to most sequences will produce a fractal scatterplot graph. - _David Williams_, Jan 20 2019 %H A321043 Rémy Sigrist, <a href="/A321043/b321043.txt">Table of n, a(n) for n = 1..10000</a> %H A321043 Rémy Sigrist, <a href="/A321043/a321043.gp.txt">PARI program for A321043</a> %e A321043 1,2,4,8,16,32,64,128,256,512,1024, ..., 4096, ..., 32768, ... gives 1,2,4,8,6,3,5,0,9,7. %e A321043 Then we get 16,32,64,12,28,25,56,51,10,24,20,48,40,96,81,19,92,... %e A321043 11 does not appear until 2^40 = 1099511627776. %o A321043 (PARI) \\ See Links section. %Y A321043 Cf. A000079, A105177. %Y A321043 See A030000 for an inverse. %K A321043 nonn,base,look %O A321043 1,2 %A A321043 _David Williams_, Oct 26 2018 %E A321043 Edited by _N. J. A. Sloane_, Oct 27 2018 %E A321043 More terms from _Rémy Sigrist_, Oct 27 2018