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A252587 Number of (n+2)X(1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 0 1 2 7 8 or 9 1
13170, 139918, 1741670, 22094800, 278456362, 3517561890, 44483332378, 562542584596, 7113728991186, 89959705046532, 1137631021088014, 14386487475717882, 181931584022864112, 2300708140965333052 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A252590

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=2

..2..0..1....2..1..3....3..1..2....2..1..1....2..0..3....1..2..2....2..0..3

..2..3..1....1..1..1....1..2..1....2..2..2....0..2..2....2..0..1....0..1..2

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

..1..2..2....1..1..2....2..1..1....1..1..2....2..1..2....1..3..0....1..2..1

CROSSREFS

Sequence in context: A102331 A064252 A252590 * A235967 A184001 A031620

Adjacent sequences:  A252584 A252585 A252586 * A252588 A252589 A252590

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2014

STATUS

approved

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Last modified May 17 12:55 EDT 2021. Contains 343971 sequences. (Running on oeis4.)