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 A225998 #8 Sep 06 2013 02:02:51 %S A225998 22176,335386827776,849096326082723840,3382498893919837995663360, %T A225998 12525301776918401256778352295936, %U A225998 47806396948285999641998907781626724352,186570872745316137212860850541663493543690240 %N A225998 Number of pairs of orthogonal (-5,6) vectors of length 11*n. %C A225998 Row 12 of A225987. %H A225998 R. H. Hardin, <a href="/A225998/b225998.txt">Table of n, a(n) for n = 1..41</a> %e A225998 Some solutions for n=1 %e A225998 .-5..6...-5..6....6..6...-5..6....6..6...-5..6....6..6...-5..6...-5..6...-5.-5 %e A225998 ..6.-5....6..6...-5..6....6..6...-5..6....6..6....6..6...-5..6...-5..6...-5.-5 %e A225998 ..6..6....6..6....6.-5....6..6....6..6....6..6...-5..6...-5..6....6..6...-5.-5 %e A225998 ..6.-5....6.-5....6..6....6..6...-5..6....6.-5....6.-5....6..6....6..6...-5..6 %e A225998 ..6.-5....6.-5....6.-5....6.-5....6.-5....6..6....6..6....6.-5....6.-5...-5.-5 %e A225998 ..6..6....6..6....6.-5....6.-5....6.-5....6..6....6.-5....6..6...-5..6...-5.-5 %e A225998 ..6..6....6..6....6..6....6.-5....6.-5....6.-5....6.-5....6.-5....6.-5...-5.-5 %e A225998 ..6..6...-5..6....6..6....6..6....6..6...-5..6....6..6....6..6....6..6...-5..6 %e A225998 ..6..6...-5..6....6.-5...-5..6....6..6...-5..6...-5..6....6..6....6..6....6.-5 %e A225998 .-5..6...-5..6....6.-5...-5..6....6.-5....6..6....6..6...-5..6....6..6...-5..6 %e A225998 ..6.-5....6..6....6..6....6..6....6..6...-5..6...-5..6....6..6....6.-5....6.-5 %K A225998 nonn %O A225998 1,1 %A A225998 _R. H. Hardin_, May 22 2013