A251299 - OEIS

%I #4 Dec 01 2014 11:51:52

%S 1950036,71163896,3313122288,203797267488,15983177343168,

%T 1492135910643272,155808707894943636,17437938159273237360,

%U 2036816489163787580492,244271558736881953551100

%N Number of (n+1)X(7+1) 0..3 arrays with every 2X2 subblock summing to 3 6 or 9

%C Column 7 of A251300

%H R. H. Hardin, <a href="/A251299/b251299.txt">Table of n, a(n) for n = 1..21</a>

%e Some solutions for n=1

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 01 2014