A251999 Number of (n+2)X(7+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 4 5 or 7

173871388, 79312163374, 40596220326266, 20811403922202520, 10674144780289546954, 5477004140225156474736, 2810624107790172363233942, 1442327760209164035443021466, 740159863895738957327641607158

Offset

1,1

Comments

Column 7 of A252000

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

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

Crossrefs

Sequence in context: A233598 A187316 A306875 * A003850 A003843 A093047

Adjacent sequences: A251996 A251997 A251998 * A252000 A252001 A252002

Keyword

nonn

Author

R. H. Hardin, Dec 12 2014

Status

approved