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 A191843 #4 Mar 30 2012 18:57:33 %S A191843 0,2,4,5,6,7,10,12,15,16,18,19,25,26,28,31,40,42,46,49,50,52,65,68,74, %T A191843 80,81,83,86,105,110,120,129,131,135,138,141,170,178,194,209,212,218, %U A191843 224,227,230,275,288,314,338,343,353,362,368,371,374,445,466,508 %N A191843 Ordered nonnegative differences f-3*g, where f and g are positive Fibonacci numbers (A000045). %t A191843 (See A191842.) %Y A191843 Cf. A191842, A191844, A191845. %K A191843 nonn %O A191843 1,2 %A A191843 _Clark Kimberling_, Jun 17 2011