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A251915 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum 2 4 5 or 7 and every diagonal and antidiagonal sum not 2 4 5 or 7 0
1194, 3054, 6086, 25882, 340800, 6752446, 249690188, 13251150646, 1129132756936, 134581826099074, 26074659792166044, 7042204562689607110, 3076055248250450622008, 1874713355693280173742202 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A251923

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A103172 A251923 A251916 * A166221 A096955 A113898

Adjacent sequences:  A251912 A251913 A251914 * A251916 A251917 A251918

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 11 2014

STATUS

approved

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Last modified July 5 14:54 EDT 2022. Contains 355099 sequences. (Running on oeis4.)