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 A122927 #2 Mar 30 2012 17:35:16 %S A122927 1,4,9,15,21,24,37,38,48,50,61,62,81,75,87,93,109,99,123,109,138,132, %T A122927 149,133,178,154,179,171,198,179,215,196,233,211,238,221,268,236,268, %U A122927 246,299,269,302,282,323,295,327,305,374,322,355,337,396,339,402,358 %N A122927 Number of occurrences of n in A122921. %C A122927 The first such occurrence is at A122925(n); the last is at 4n^2. %Y A122927 Cf. A122921, A122925, A122926. %K A122927 nonn %O A122927 0,2 %A A122927 _Franklin T. Adams-Watters_, Sep 19 2006