A254846 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum one and no antidiagonal sum two

192, 1369, 5904, 37636, 296800, 3316041, 50676440, 827137600, 14800497228, 375688088356, 12300608282796, 537256027718656, 31510169714238336, 2195764633971767824, 171957812290330672116, 18426406279700831356816

Offset

1,1

Comments

Diagonal of A254854

Links

R. H. Hardin, Table of n, a(n) for n = 1..20

Example

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

Crossrefs

Sequence in context: A346251 A133064 A183685 * A051526 A188786 A362510

Adjacent sequences: A254843 A254844 A254845 * A254847 A254848 A254849

Keyword

nonn

Author

R. H. Hardin, Feb 08 2015

Status

approved