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A251911 Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 or 7 1
950384, 34096384, 1228480800, 44527823912, 1618348274612, 58876374190872, 2143054938148128, 78023852108626348, 2840985823286633136, 103450828934076482648, 3767124749546516886092, 137180191804313105874632 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A251912

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..33

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Sequence in context: A345640 A346353 A203823 * A224593 A341897 A341898

Adjacent sequences:  A251908 A251909 A251910 * A251912 A251913 A251914

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 10 2014

STATUS

approved

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Last modified May 17 00:26 EDT 2022. Contains 353724 sequences. (Running on oeis4.)