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 A183297 #4 Mar 30 2012 18:57:12
%S A183297 1,2,4,5,6,7,8,9,10,12,13,14,15,16,17,18,19,20,21,22,23,25,26,27,28,
%T A183297 29,30,31,32,33,34,35,36,37,38,39,40,41,43,44,45,46,47,48,49,50,51,52,
%U A183297 53,54,55,56,57,58,59,60,61,62,63,64,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85
%N A183297 Complement of A005475.
%F A183297 (See the Mathematic code.)
%t A183297 a=5/2; b=1/2;
%t A183297 F[n_]:=a*n^2+b*n;
%t A183297 R[n_]:=(n/a+((b-1)/(2a))^2)^(1/2);
%t A183297 G[n_]:=n-1+Ceiling[R[n]-(b-1)/(2a)];
%t A183297 Table[F[n], {n,60}]
%t A183297 Table[G[n], {n,100}]
%K A183297 nonn
%O A183297 1,2
%A A183297 _Clark Kimberling_, Jan 03 2011