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 A188446 #13 Dec 17 2018 02:30:31 %S A188446 1,0,0,1,278,67198,24537905,13744869502,11385203921707, %T A188446 13429702800066408,21828741452174445770,47540906064229854124913, %U A188446 135469436416591290078176485,494882516747849393466094870718,2277287830010010200588821272208162,13000224127787800362702159372817442122 %N A188446 Number of (4*n) X n binary arrays with nonzero rows in decreasing order and 4 ones in every column. %H A188446 Andrew Howroyd, <a href="/A188446/b188446.txt">Table of n, a(n) for n = 0..50</a> %e A188446 Some solutions for 16 X 4: %e A188446 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 %e A188446 1 1 0 1 1 0 1 0 1 1 1 0 1 1 1 0 1 1 0 0 %e A188446 1 0 1 0 1 0 0 1 1 0 1 1 1 0 1 0 1 0 1 1 %e A188446 1 0 0 1 1 0 0 0 1 0 0 0 1 0 0 1 1 0 0 1 %e A188446 0 1 1 0 0 1 1 1 0 1 0 1 0 1 0 1 0 1 1 0 %e A188446 0 1 0 1 0 1 1 0 0 1 0 0 0 1 0 0 0 1 0 1 %e A188446 0 0 1 1 0 1 0 0 0 0 1 1 0 0 1 0 0 0 1 0 %e A188446 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 1 %e A188446 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 %e A188446 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 %e A188446 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 %e A188446 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 %e A188446 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 %e A188446 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 %e A188446 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 %e A188446 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 %Y A188446 Row 4 of A188445. %K A188446 nonn %O A188446 0,5 %A A188446 _R. H. Hardin_, Mar 31 2011 %E A188446 a(0)=1 prepended and terms a(9) and beyond from _Andrew Howroyd_, Dec 15 2018