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A251910 Number of (n+2)X(1+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 or 7 1
49436, 950384, 18245824, 351040004, 6755376172, 130017259448, 2502492993696, 48167226337576, 927113629971008, 17844946696018556, 343477167921733468, 6611204871172789048, 127251643536600580376, 2449323790014472880500 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A251912

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Sequence in context: A205279 A185921 A251912 * A235172 A251026 A210351

Adjacent sequences:  A251907 A251908 A251909 * A251911 A251912 A251913

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 10 2014

STATUS

approved

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Last modified May 26 13:59 EDT 2022. Contains 354092 sequences. (Running on oeis4.)