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 A218541 #16 Jun 23 2025 22:18:08 %S A218541 1,1,1,1,1,2,1,1,2,2,2,1,1,2,2,2,1,2,2,3,1,1,2,2,2,1,2,2,3,1,2,2,2,2, %T A218541 2,2,3,1,1,2,2,2,1,2,2,3,1,2,2,2,2,2,2,3,1,2,2,2,2,3,3,2,3,3,2,3,4,1, %U A218541 1,2,2,2,1,2,2,3,1,2,2,2,2,2,2,3,1,2 %N A218541 First differences of A213715. %C A218541 This sequence seems to share similar fractal characteristics with A213712. See the given link to graph-plot. %H A218541 Antti Karttunen, <a href="/A218541/b218541.txt">Table of n, a(n) for n = 0..8727</a> %H A218541 OEIS Server, <a href="https://oeis.org/plot2a?name1=A218541&name2=A213712&tform1=no+transformation&tform2=no+transformation&shift=0&radiop1=matp&drawpoints=true&drawlines=true">Sequence plotted together with A213712 showing similar fractal features.</a> %F A218541 a(n) = A213715(n+1)-A213715(n). %o A218541 (Scheme) (define (A218541 n) (- (A213715 (1+ n)) (A213715 n))) %K A218541 nonn %O A218541 0,6 %A A218541 _Antti Karttunen_, Nov 01 2012 %E A218541 Offset changed from 1 to 0 by _Antti Karttunen_, Nov 05 2012