login
Number of (n+3)X(5+3) 0..3 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero
2

%I #4 Nov 01 2013 20:18:34

%S 1170,28128,854206,22328204,584293702,15744800360,421312592376,

%T 11212196319546,298953751576910,7978859331634436,212882903519108702,

%U 5678984462257428310,151501248802796558630,4041770668683019819926

%N Number of (n+3)X(5+3) 0..3 white square subarrays x(i,j) with each element diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 4, and upper left element zero

%C Column 5 of A230949

%H R. H. Hardin, <a href="/A230946/b230946.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 01 2013