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A252202 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 1 3 4 6 or 7 1
2680, 5178, 110128, 1180226, 193004794, 78534150994, 1236950586236, 2850002858757490, 19061766897822615868, 332041393326772519346, 11522592664946008068981178, 1277874485884710320427331813954 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A252210

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A254992 A252210 A252203 * A236594 A217335 A243993

Adjacent sequences:  A252199 A252200 A252201 * A252203 A252204 A252205

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 15 2014

STATUS

approved

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Last modified September 20 16:50 EDT 2021. Contains 347586 sequences. (Running on oeis4.)