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 A166478 #11 Mar 25 2018 10:31:29 %S A166478 2,1,2,1,2,5,1,3,2,3,5,1,12,6,4,3,1,2,9,19,2,10,1,5,4,5,237,9,14,2,30, %T A166478 15,10,2,6,5,6,84,1,3,20,41,3,2,5,14,209,1,6,2,11,230,13,23,27,3,56,1, %U A166478 24,14,5,2,8,7,8,1634,11,6,2,1,35,71,4,36,24,5,18,12,3,9,8,1,2,6,14,17 %N A166478 Minimum positive integer solution t of equation n=x*(x+1)/(t*(t+1)) where n is a nonsquare integer (see A000037). %e A166478 For n=14, t=5 gives corresponding value x=20 since 14=20*21/(5*6). %Y A166478 Cf. A000037, A166477. %K A166478 nonn %O A166478 2,1 %A A166478 _Carmine Suriano_, Oct 14 2009 %E A166478 Deleted a 1 between 2 and 30. - _R. J. Mathar_, Oct 23 2010