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A252361 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 4 6 or 7 0
130, 276, 3054, 45516, 1007920, 35124242, 1875961304, 154187447172, 19636182429590, 3846077102733552, 1158727663221999306, 538512893012205801320, 385891172081488215159354 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A252369

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A064687 A238194 A252263 * A252082 A253044 A253037

Adjacent sequences:  A252358 A252359 A252360 * A252362 A252363 A252364

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 17 2014

STATUS

approved

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Last modified November 11 16:07 EST 2019. Contains 329019 sequences. (Running on oeis4.)