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 A218544 #18 Jun 01 2025 13:17:53 %S A218544 1,2,4,5,6,7,9,10,12,13,14,15,17,19,23,24,26,28,31,32,34,35,36,39,40, %T A218544 41,43,45,48,49,51,52,53,57,59,60,66,68,70,71,73,75,78,79,81,82,83,87, %U A218544 89,90,96,98,99,100,102,103,109,112,115,120,122,123,124,125 %N A218544 a(n) = A218784(n)+1. %C A218544 These terms are one more than the positions where the infinite trunk of beanstalk (A179016) changes its branching direction, i.e. where its parity changes. %H A218544 Antti Karttunen, <a href="/A218544/b218544.txt">Table of n, a(n) for n = 0..8649</a> %F A218544 a(1)=1 and in the later terms i occurs whenever A213729(i) differs from A213729(i-1). %o A218544 (Scheme) (define (A218544 n) (1+ (A218784 n))) %Y A218544 Cf. A179016, A213729, A218545, A218546, A218617, A218784. %K A218544 nonn %O A218544 0,2 %A A218544 _Antti Karttunen_, Nov 02 2012 %E A218544 Offset and definition changed because of the changed starting offset of A213729. - _Antti Karttunen_, Nov 11 2012