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A252313 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 1 3 6 or 7 0
1557, 1974, 2493, 23422, 505062, 17562749, 937981280, 77093724660, 9818091215415, 1923038551367392, 579363831611000707, 269256446506102901260, 192945586040744107580301 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A252321
LINKS
EXAMPLE
Some solutions for n=4
..3..2..3..3..3..3....3..3..3..3..3..3....3..3..3..3..2..3....3..3..3..3..3..2
..3..3..3..2..3..3....3..3..2..3..3..3....2..3..3..3..3..2....3..3..3..3..3..3
..3..3..3..3..3..3....3..3..3..3..3..3....3..3..3..3..3..3....2..3..3..3..3..3
..2..3..3..3..3..3....3..2..3..3..3..3....3..3..3..3..3..3....3..3..3..2..3..3
..3..3..2..3..3..2....3..3..3..3..3..3....2..3..3..3..2..3....3..2..3..3..3..2
..3..3..3..3..2..3....3..3..2..3..3..3....3..3..2..3..3..3....3..3..3..3..3..3
CROSSREFS
Sequence in context: A229434 A022222 A166606 * A252321 A252314 A186393
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 16 2014
STATUS
approved

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Last modified May 27 17:52 EDT 2024. Contains 372880 sequences. (Running on oeis4.)