|
%I #5 Mar 31 2012 12:37:14
%S 13,169,1153,6837,35277,170409,783557,3498981,15313557,66183221,
%T 283695069,1209894989,5143701217,21827038973,92522770909,391969130401,
%U 1660088519969,7030078814173,29769974336161,126068348345329
%N Number of nX4 0..1 arrays avoiding 0 0 0 horizontally and 0 1 1 vertically
%C Column 4 of A206936
%H R. H. Hardin, <a href="/A206932/b206932.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 10*a(n-1) -24*a(n-2) -50*a(n-3) +241*a(n-4) -8*a(n-5) -750*a(n-6) +328*a(n-7) +1008*a(n-8) -448*a(n-9) -642*a(n-10) +200*a(n-11) +191*a(n-12) -34*a(n-13) -24*a(n-14) +2*a(n-15) +a(n-16)
%e Some solutions for n=4
%e ..0..1..1..1....1..0..0..1....1..0..0..1....0..0..1..1....0..0..1..0
%e ..1..0..1..0....1..0..1..1....0..1..1..1....1..1..1..1....0..0..1..1
%e ..0..0..1..0....0..1..0..0....1..0..0..1....0..0..1..1....0..1..1..0
%e ..0..0..1..1....0..0..1..0....0..0..1..1....0..1..1..0....0..0..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Feb 13 2012
| 