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A252057 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 4 0
125, 346, 2349, 30182, 664938, 23078709, 1229012088, 100756110010, 12788352089472, 2503090258367123, 754443908148691278, 350544406954555223319 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A252065

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

Some solutions for n=4

..2..2..1..2..2..1....1..2..2..2..1..2....1..2..2..2..2..1....2..1..2..2..1..2

..1..2..2..2..2..2....2..2..2..2..2..2....2..2..2..2..2..2....1..2..2..2..2..2

..2..2..2..2..2..2....2..2..2..2..2..1....2..2..2..2..2..2....2..2..2..2..2..2

..2..2..2..2..2..1....1..2..2..2..2..2....2..2..2..2..2..2....2..2..2..1..2..2

..2..2..2..2..2..2....2..2..2..2..2..2....1..1..1..1..1..1....1..2..2..2..2..2

..2..1..2..2..2..2....2..1..2..2..2..1....2..2..2..2..2..2....2..2..2..2..1..2

CROSSREFS

Sequence in context: A175486 A250579 A161855 * A045184 A059470 A316387

Adjacent sequences:  A252054 A252055 A252056 * A252058 A252059 A252060

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 13 2014

STATUS

approved

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Last modified September 20 01:54 EDT 2020. Contains 337260 sequences. (Running on oeis4.)