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 A072231 #10 Mar 17 2015 23:01:16 %S A072231 1,4,4,5,8,9,9,12,13,16,20,18,21,24,22,28,28,29,32,33,36,40,44,36,44, %T A072231 48,45,49,52,56,48,60,64,57,58,68,68,65,72,72,73,76,77,80,84,88,92,72, %U A072231 100,100,86,96,108,97,100,112,101,112,108,112,116,120,99,124,136,114,128 %N A072231 a(n) = floor(n^2/A005185(n-1)), where A005185 is Hofstadter's Q-sequence. %Y A072231 Cf. A005185. %K A072231 nonn %O A072231 1,2 %A A072231 _Roger L. Bagula_, Jul 05 2002 %E A072231 Corrected and extended by _Robert G. Wilson v_, Jun 05 2004 %E A072231 Edited by _N. J. A. Sloane_, Jun 07 2004