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 A087928 #4 Mar 31 2012 12:35:01 %S A087928 64,57477120,1323082429842432,137813651152462288749440, %T A087928 49992325433734834899948931370880 %N A087928 Number of ways of arranging the numbers 1 ... 7n into a 7 X n array so there is exactly one local maximum. %Y A087928 A row of the array in A087783. Cf. A007846. %K A087928 nonn %O A087928 1,1 %A A087928 _R. H. Hardin_, Oct 27 2003