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 A204997 #8 Mar 30 2012 18:58:09 %S A204997 1,1,1,1,4,4,9,1,16,16,25,4,36,36,1,9,64,9,81,16,4,100,121,1,25,144,9, %T A204997 36,196,4,225,4,16,256,1,9,324,324,25,9,400,16,441,100,4,484,529,1,49, %U A204997 25,49,144,676,36,9,25,64,784,841,4 %N A204997 The square j^2 such that n divides k^2-j^2>0, where k is the least positive integer for which such a j exists. %C A204997 For a guide to related sequences, see A204892. %t A204997 (See the program at A204994.) %Y A204997 Cf. A204892, A204994. %K A204997 nonn %O A204997 1,5 %A A204997 _Clark Kimberling_, Jan 21 2012