A252138 Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 4 6 or 7

3905, 24031, 213689, 1741344, 14105069, 115183261, 937980660, 7634089505, 62282795715, 507708323758, 4135550418633, 33696297343197, 274629581667408, 2238121992115213, 18238035152919716, 148617809035821872

Offset

1,1

Comments

Column 7 of A252139

Links

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

Example

Some solutions for n=2
..3..3..2..3..3..3..3..3..3....3..3..3..3..3..3..3..3..2
..2..3..3..3..3..3..3..3..3....3..3..3..3..3..3..3..3..3
..3..3..3..3..3..3..3..3..3....3..3..3..3..3..3..3..3..3
..3..3..3..2..3..3..3..3..2....2..3..3..2..3..3..2..3..3

Crossrefs

Sequence in context: A242873 A135202 A204147 * A115468 A066386 A326385

Adjacent sequences: A252135 A252136 A252137 * A252139 A252140 A252141

Keyword

nonn

Author

R. H. Hardin, Dec 14 2014

Status

approved