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A252344 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 3 5 6 or 8 and every 3X3 diagonal and antidiagonal sum equal to 0 3 5 6 or 8 0
562, 1386, 6986, 40756, 592230, 11021412, 249626459, 15316883573, 776195661759, 48304754871426, 11765535679080573, 1482895646097699360, 245504085165829558660, 254091374667549037155557 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A252352

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A252352 A252345 A121508 * A250976 A209907 A232679

Adjacent sequences:  A252341 A252342 A252343 * A252345 A252346 A252347

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 16 2014

STATUS

approved

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Last modified September 22 06:53 EDT 2020. Contains 337289 sequences. (Running on oeis4.)