cp's OEIS Frontend

A230706 Number of (n+3)X(6+3) 0..2 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 3, and upper left element zero.

%I A230706 #6 Jul 23 2025 05:57:57
%S A230706 1172,21076,1025430,17497342,801845362,13663471254,625553036008,
%T A230706 10652997961328,487784854592488,8305829325372360,380324726478587580,
%U A230706 6475874805604555424,296532282288946047888,5049115344840115896488
%N A230706 Number of (n+3)X(6+3) 0..2 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 3, and upper left element zero.
%C A230706 Column 6 of A230708
%H A230706 R. H. Hardin, <a href="/A230706/b230706.txt">Table of n, a(n) for n = 1..210</a>
%e A230706 Some solutions for n=2
%e A230706 ..0..x..0..x..0..x..1..x..1....0..x..0..x..1..x..1..x..2
%e A230706 ..x..1..x..1..x..2..x..2..x....x..1..x..2..x..2..x..0..x
%e A230706 ..0..x..2..x..1..x..0..x..1....2..x..1..x..0..x..2..x..1
%e A230706 ..x..1..x..0..x..0..x..1..x....x..0..x..2..x..1..x..2..x
%e A230706 ..0..x..2..x..2..x..2..x..0....2..x..2..x..0..x..0..x..1
%K A230706 nonn
%O A230706 1,1
%A A230706 _R. H. Hardin_, Oct 28 2013