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A252597 Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5 0
303, 1151, 7769, 81441, 1547711, 49281939, 2541062469, 205891508707, 25990396753815, 5072924616525133 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A252605

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A098241 A252605 A252598 * A237093 A236813 A332130

Adjacent sequences:  A252594 A252595 A252596 * A252598 A252599 A252600

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 19 2014

STATUS

approved

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Last modified May 13 23:41 EDT 2021. Contains 343868 sequences. (Running on oeis4.)