A251800 - OEIS

%I #4 Dec 09 2014 07:38:16

%S 4206453,1271711747,413630526506,145329837643171,52256028323545001,

%T 19010586449609604592,6950854990205965398511,

%U 2548249927405969316226847,935397563567598908162444188,343605100623054019565873475859

%N Number of (n+1)X(7+1) 0..3 arrays with no 2X2 subblock having x11-x00 less than x10-x01

%C Column 7 of A251801

%H R. H. Hardin, <a href="/A251800/b251800.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

%e ..0..0..2..2..0..0..1..3....0..0..0..1..1..3..3..3....0..0..0..0..0..0..2..0

%e ..0..2..0..0..2..2..3..1....0..0..2..2..2..0..3..3....0..0..0..0..3..3..1..3

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 09 2014