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 A209598 #7 Jul 22 2025 21:51:13 %S A209598 82556485632,61291132048828125,709908161907247808512, %T A209598 923682425022125244140625,310357092660359621536382976, %U A209598 41461694858240499304086993277,2836619246897071128576000000000 %N A209598 Number of 7X7 0..n arrays with every element equal to a diagonal or antidiagonal reflection. %C A209598 Row 7 of A209593 %H A209598 R. H. Hardin, <a href="/A209598/b209598.txt">Table of n, a(n) for n = 1..50</a> %F A209598 a(n) = (n+1) ^ 13 * ((n+1)*(2*n+1)) ^ 9 %K A209598 nonn %O A209598 1,1 %A A209598 _R. H. Hardin_ Mar 10 2012