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 A175971 #13 Oct 15 2014 09:30:55 %S A175971 16,16,144,400,144,784,1296,400,1936,2704,784,3600,4624,1296,5776, %T A175971 7056,1936,8464,10000,2704,11664,13456,3600,15376,17424,4624,19600, %U A175971 21904,5776,24336,26896,7056,29584,32400,8464,35344,38416,10000,41616,44944,11664,48400,51984,13456,55696 %N A175971 Denominators of 1/16-1/m^2 for some m>0, which are of the form (8*k+4)^2, sorted by increasing m. %C A175971 A permutation of A174994. %C A175971 The list of associated m is 1, 2, 3, 5, 6, 7, 9, 10, 11, 13, 14, 15, 17, 18, 19, 21, 22, 23, apparently A042968. [_R. J. Mathar_, Dec 07 2010] %F A175971 Empirical g.f.: -16*x*(x^8+x^7+9*x^6+22*x^5+6*x^4+22*x^3+9*x^2+x+1) / ((x-1)^3*(x^2+x+1)^3). - _Colin Barker_, Oct 15 2014 %K A175971 nonn,less %O A175971 1,1 %A A175971 _Paul Curtz_, Dec 06 2010