A251059 - OEIS

%I #4 Nov 29 2014 18:13:40

%S 222,2740,31895,379440,4499219,53420941,634161915,7528829372,

%T 89381885986,1061143804301,12597914485712,149562686271463,

%U 1775611051165233,21080088759507993,250263221101743326,2971129803512557016

%N Number of (n+1)X(2+1) 0..2 arrays with no 2X2 subblock having x11-x00 less than x10-x01

%C Column 2 of A251065

%H R. H. Hardin, <a href="/A251059/b251059.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 14*a(n-1) -12*a(n-2) -184*a(n-3) +281*a(n-4) +477*a(n-5) -863*a(n-6) -69*a(n-7) +517*a(n-8) -106*a(n-9) -80*a(n-10) +24*a(n-11)

%e Some solutions for n=3

%e ..2..0..0....2..1..2....1..2..1....0..2..2....0..0..0....0..0..2....0..0..2

%e ..0..2..2....0..2..1....0..0..1....1..0..1....1..2..2....1..2..2....0..2..0

%e ..2..0..2....0..0..2....0..1..1....1..2..2....0..0..1....1..2..2....0..0..2

%e ..0..2..1....0..1..2....0..1..1....0..1..2....0..1..1....2..1..2....1..2..0

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 29 2014