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 A226002 #8 Sep 06 2013 02:02:31 %S A226002 23760,241040067840,927160196029562880,2606734186332708640980992, %T A226002 10726454782976061347559450869760, %U A226002 39254958066409241851311669665794621440,146612881747544901468330072567145716462387200 %N A226002 Number of pairs of orthogonal (-4,7) vectors of length 11*n. %C A226002 Row 16 of A225987. %H A226002 R. H. Hardin, <a href="/A226002/b226002.txt">Table of n, a(n) for n = 1..40</a> %e A226002 Some solutions for n=1 %e A226002 .-4..7...-4..7....7..7...-4..7....7..7....7..7....7..7...-4..7....7..7....7..7 %e A226002 ..7.-4...-4..7...-4..7....7.-4...-4..7...-4..7...-4..7...-4..7...-4..7...-4..7 %e A226002 .-4..7...-4..7....7.-4....7.-4....7..7....7.-4....7..7....7..7...-4..7....7..7 %e A226002 ..7..7...-4..7....7..7....7..7...-4..7...-4..7....7.-4....7..7....7..7....7.-4 %e A226002 ..7..7....7..7....7..7....7.-4...-4..7....7..7....7..7....7..7....7..7...-4..7 %e A226002 .-4..7...-4..7...-4..7....7..7....7..7....7..7...-4..7....7..7....7.-4...-4..7 %e A226002 ..7.-4....7..7...-4..7....7..7....7.-4....7..7....7.-4...-4..7...-4..7...-4..7 %e A226002 ..7..7...-4..7....7..7....7.-4....7.-4...-4..7....7..7....7.-4...-4..7...-4..7 %e A226002 ..7.-4....7..7....7.-4...-4..7....7..7...-4..7....7.-4...-4..7....7.-4....7..7 %e A226002 ..7..7....7.-4...-4..7....7..7...-4..7....7.-4....7.-4....7.-4...-4..7...-4..7 %e A226002 ..7.-4....7..7...-4..7....7.-4...-4..7...-4..7....7.-4....7.-4....7..7....7..7 %K A226002 nonn %O A226002 1,1 %A A226002 _R. H. Hardin_, May 22 2013