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A251910 Number of (n+2)X(1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 or 7 1

%I #5 Dec 10 2014 17:19:37

%S 49436,950384,18245824,351040004,6755376172,130017259448,

%T 2502492993696,48167226337576,927113629971008,17844946696018556,

%U 343477167921733468,6611204871172789048,127251643536600580376,2449323790014472880500

%N Number of (n+2)X(1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 or 7

%C Column 1 of A251912

%H R. H. Hardin, <a href="/A251910/b251910.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 10 2014

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)