A251906 - OEIS

%I #5 Dec 10 2014 17:08:40

%S 9552,87472,910694,9385210,97416802,1020849168,10715275730,

%T 112555491252,1183170494828,12443858370610,130926427024938,

%U 1377879830335924,14503761516792180,152692922606927074,1607716744587004974

%N Number of (n+2)X(1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 4 or 5

%C Column 1 of A251909

%H R. H. Hardin, <a href="/A251906/b251906.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 10 2014