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 A191917 #4 Mar 30 2012 18:57:33 %S A191917 0,1,2,3,4,5,7,9,10,11,12,15,16,18,21,23,25,27,29,33,39,40,41,45,47, %T A191917 54,62,65,68,70,74,76,87,101,105,109,115,117,121,123,141,163,170,177, %U A191917 185,191,193,197,199,228,264,275,286,300,308,314,316,320,322,369 %N A191917 Ordered sequence of nonnegative differences f-2*g, where f and g are Lucas numbers (A000032 beginning at 1). %t A191917 (See A191916.) %Y A191917 Cf. A191916, A191918, A191919. %K A191917 nonn %O A191917 1,3 %A A191917 _Clark Kimberling_, Jun 19 2011