%I #5 Mar 31 2012 12:36:43
%S 6,20,56,140,330,745,1634,3504,7388,15366,31612,64446,130391,262113,
%T 523984,1042433,2065098,4075761,8017395,15724110,30756544,60014931,
%U 116849951,227054267,440389499,852738289,1648633351,3182830233
%N Number of nX2 0..2 arrays with every diagonal, row and column running average nondecreasing rightwards and downwards and diagonally
%C Column 2 of A201155
%H R. H. Hardin, <a href="/A201149/b201149.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 7*a(n-1) -16*a(n-2) +4*a(n-3) +39*a(n-4) -56*a(n-5) +2*a(n-6) +59*a(n-7) -49*a(n-8) -5*a(n-9) +29*a(n-10) -14*a(n-11) -2*a(n-12) +4*a(n-13) -a(n-14)
%e Some solutions for n=10
%e ..0..1....0..0....0..0....0..0....0..0....0..0....0..1....0..1....0..0....0..0
%e ..0..1....0..0....0..0....0..0....0..0....0..2....0..1....0..1....0..0....0..0
%e ..0..2....0..0....1..2....0..2....0..2....0..1....0..1....0..2....0..0....0..0
%e ..1..2....0..2....2..2....0..1....0..2....1..1....0..1....0..2....0..1....0..1
%e ..2..2....0..2....1..2....0..1....1..2....1..2....2..2....1..2....0..1....0..2
%e ..1..2....0..2....2..2....1..1....1..2....1..2....1..2....1..2....0..1....0..2
%e ..1..2....1..1....1..2....1..2....1..2....1..2....2..2....1..2....0..2....0..2
%e ..1..2....1..1....2..2....1..2....1..2....1..2....2..2....2..2....0..1....1..1
%e ..1..2....1..2....2..2....2..2....1..2....1..2....1..2....2..2....1..1....1..1
%e ..2..2....1..2....2..2....1..2....2..2....2..2....1..2....2..2....1..2....2..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Nov 27 2011
|