A251911 Number of (n+2) X (2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3 X 3 subblock summing to 2 or 7.

950384, 34096384, 1228480800, 44527823912, 1618348274612, 58876374190872, 2143054938148128, 78023852108626348, 2840985823286633136, 103450828934076482648, 3767124749546516886092, 137180191804313105874632

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

Cf. A251912.

Sequence in context: A345640 A346353 A203823 * A224593 A376473 A341897

Adjacent sequences: A251908 A251909 A251910 * A251912 A251913 A251914

Keyword

nonn

Author

R. H. Hardin, Dec 10 2014

Status

approved