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A230700 Number of (n+3)X(n+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 0
2, 28, 2106, 121382, 43853402, 13663471254, 26681634560690, 45145901233869558, 479398570293769095556, 4408105907275837627631446 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A230708

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=2

..0..x..2..x..2....0..x..0..x..1....0..x..2..x..2....0..x..0..x..1

..x..1..x..0..x....x..1..x..2..x....x..1..x..0..x....x..1..x..2..x

..0..x..2..x..1....2..x..1..x..0....0..x..1..x..2....0..x..2..x..1

..x..1..x..2..x....x..0..x..1..x....x..2..x..0..x....x..2..x..0..x

..0..x..0..x..1....2..x..2..x..0....1..x..1..x..2....1..x..1..x..2

CROSSREFS

Sequence in context: A238817 A202942 A177400 * A168554 A152792 A085602

Adjacent sequences:  A230697 A230698 A230699 * A230701 A230702 A230703

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 28 2013

STATUS

approved

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Last modified March 26 05:43 EDT 2019. Contains 321481 sequences. (Running on oeis4.)