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A252097 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 4 6 or 7 1
2458, 4866, 10878, 86575, 1704334, 41913367, 1113772174, 116789064529, 10681007815392, 910992764352996, 511227354741819354, 159266179111795253990, 40440676759528810785390, 126229089092571690095740538 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A252105

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..15

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A252013 A252105 A252098 * A252225 A283640 A043588

Adjacent sequences:  A252094 A252095 A252096 * A252098 A252099 A252100

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 14 2014

STATUS

approved

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Last modified May 21 00:36 EDT 2022. Contains 353886 sequences. (Running on oeis4.)