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 A184462 #11 Dec 14 2014 16:23:33 %S A184462 91,1693,42874,1181303,33787978,986306398,29202473260,873679701315, %T A184462 26348265181700,799618906955872,24390561043319626,747104810403124190, %U A184462 22965144760897452728,708038892975800125716,21885932074900784746650 %N A184462 Half the number of (n+1) X 5 binary arrays with equal numbers of majority one 2 X 2 subblocks and majority zero 2 X 2 subblocks. %C A184462 Column 4 of A184467. %H A184462 R. H. Hardin, <a href="/A184462/b184462.txt">Table of n, a(n) for n = 1..187</a> %e A184462 Some solutions for 3 X 5: %e A184462 ..0..1..0..0..0....0..1..1..0..0....0..0..0..0..0....0..0..0..1..0 %e A184462 ..0..1..1..0..1....1..1..0..1..0....1..0..1..1..0....0..0..1..1..1 %e A184462 ..0..1..1..0..1....0..0..0..1..0....1..1..1..0..1....0..0..0..1..1 %e A184462 ... %e A184462 ...E..P..M..M.......P..P..E..M.......M..M..E..M.......M..M..P..P... %e A184462 ...E..P..E..E.......E..M..E..E.......P..P..P..E.......M..M..P..P... %K A184462 nonn %O A184462 1,1 %A A184462 _R. H. Hardin_, Jan 15 2011