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 A183574 #7 Mar 30 2012 18:57:12
%S A183574 3,4,5,7,8,9,11,12,13,14,15,17,18,19,20,21,23,24,25,26,27,28,29,31,32,
%T A183574 33,34,35,36,37,39,40,41,42,43,44,45,46,47,49,50,51,52,53,54,55,56,57,
%U A183574 59,60,61,62,63,64,65,66,67,68,69,71,72,73,74,75,76,77,78,79,80,81,83,84,85,86,87,88,89,90,91,92
%N A183574 n+Floor[sqrt(2n+2)].
%F A183574 a(n)=n+Floor[sqrt(2n+2)].
%t A183574 a=2;b=2; Table[n+Floor[(a*n+b)^(1/2)],{n,80}]
%Y A183574 Cf. A183575, the complement of A183574.
%K A183574 nonn,easy
%O A183574 1,1
%A A183574 _Clark Kimberling_, Jan 05 2011