A252097 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 4 6 or 7

2458, 4866, 10878, 86575, 1704334, 41913367, 1113772174, 116789064529, 10681007815392, 910992764352996, 511227354741819354, 159266179111795253990, 40440676759528810785390, 126229089092571690095740538

Offset

1,1

Comments

Diagonal of A252105

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

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

Crossrefs

Sequence in context: A252013 A252105 A252098 * A252225 A283640 A043588

Adjacent sequences: A252094 A252095 A252096 * A252098 A252099 A252100

Keyword

nonn

Author

R. H. Hardin, Dec 14 2014

Status

approved