A251855 - OEIS

%I #4 Dec 09 2014 21:15:53

%S 23664,459952,10413561,216245728,4504504613,95484824630,2014749003137,

%T 42431856405171,894942181261893,18875574496561053,398002497183748752,

%U 8392744063343679219,176985313926803440855,3732159821929478119097

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

%C Column 2 of A251858

%H R. H. Hardin, <a href="/A251855/b251855.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=1

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 09 2014