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 A138683 #2 Mar 30 2012 17:37:58 %S A138683 2,3,6,7,8,12,13,16,17,18,19,20,26,27,30,31,32,36,37,40,41,42,43,44, %T A138683 45,46,47,48,49,60,61,64,65,66,70,71,74,75,76,77,78,84,85,88,89,90,94, %U A138683 95,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115 %N A138683 a(1)=1 and, for n>1, a(n) is the smallest integer greater than a(n-1) such that a(n) and a(k) do not sum to a term of A001333 (Numerators of continued fraction convergents to sqrt(2)). %C A138683 The graph of the first differences (A138684) of this sequence is fractal-like. %Y A138683 Cf. A001333, A005652, A114889, A138684. %K A138683 nonn %O A138683 1,1 %A A138683 _John W. Layman_, Mar 26 2008