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 A290749 #5 Aug 12 2017 08:47:25 %S A290749 15,17,25,27,28,30,36,38,39,40,41,43,44,45,46,48,49,51,59,61,62,64,65, %T A290749 66,67,69,70,71,72,73,74,75,77,78,79,80,82,83,85,91,93,94,95,96,98,99, %U A290749 100,101,102,103,104,105,106,107,108,109,111,112,113,114,115,116,117,118,119,120,121,122,124 %N A290749 Let F denote the two-way infinite sequence of Fibonacci numbers (for all positive or negative integers k, F(k+2)=F(k)+F(k+1) with F(0)=0, F(1)=1). Sequence lists positive numbers that are not the difference between two terms of F. %C A290749 Complement of A290748. %Y A290749 Cf. A290748. %K A290749 nonn %O A290749 1,1 %A A290749 _N. J. A. Sloane_, Aug 12 2017