A251998 Number of (n+2)X(6+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 4 5 or 7

21680096, 4946174244, 1265816542694, 324452741031424, 83204478074887540, 21346172975835532882, 5477004140225156474736, 1405295402341047031585982, 360572463634696346650972140, 92516184100747798001449294374

Offset

1,1

Comments

Column 6 of A252000

Links

R. H. Hardin, Table of n, a(n) for n = 1..53

Example

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

Crossrefs

Sequence in context: A253543 A334372 A250912 * A210389 A364435 A118860

Adjacent sequences: A251995 A251996 A251997 * A251999 A252000 A252001

Keyword

nonn

Author

R. H. Hardin, Dec 12 2014

Status

approved