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 A087925 #4 Mar 31 2012 12:35:01 %S A087925 8,3584,7452704,35704394880,331333877743200,5338455334819710720, %T A087925 137813651152462288749440,5359457796069778002771306240, %U A087925 299167849199075018703047460201600 %N A087925 Number of ways of arranging the numbers 1 ... 4n into a 4 X n array so there is exactly one local maximum. %Y A087925 A row of the array in A087783. Cf. A007846. %K A087925 nonn %O A087925 1,1 %A A087925 _R. H. Hardin_, Oct 27 2003