A252431 Number of (n+2) X (6+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0, 2, 4, 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0, 2, 4, 6 or 7.

4342, 6178, 20632, 74892, 302218, 1190037, 4567070, 18926855, 75297774, 295100889, 1242624198, 4990775266, 19801640382, 84145500595, 339967116597, 1358270617004, 5801780624546, 23517731641120, 94321862217975

Offset

1,1

Comments

Column 6 of A252433.

Links

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

Example

Some solutions for n=4
..3..1..3..3..1..0..3..1....2..2..0..2..2..3..2..2....3..0..1..3..3..1..3..3
..2..2..3..2..2..3..2..2....1..3..3..1..0..3..1..3....3..2..2..3..2..2..3..2
..3..2..2..3..2..2..0..2....2..3..2..2..3..2..2..3....2..3..2..2..3..2..2..3
..3..1..0..3..1..3..3..1....2..2..3..2..2..3..2..2....3..3..1..0..3..1..3..3
..2..2..3..2..2..3..2..2....1..3..3..1..3..3..1..3....3..2..2..3..2..2..3..2
..3..2..2..0..2..2..3..2....2..3..2..2..0..2..2..3....2..3..2..2..3..2..2..0

Crossrefs

Cf. A252433.

Sequence in context: A172915 A317046 A259961 * A251947 A145916 A048900

Adjacent sequences: A252428 A252429 A252430 * A252432 A252433 A252434

Keyword

nonn

Author

R. H. Hardin, Dec 17 2014

Status

approved