A254848 Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum one and no antidiagonal sum two

576, 1369, 2916, 6889, 16900, 42436, 103684, 250000, 595984, 1447209, 3541924, 8761600, 21399876, 52186176, 126067984, 306915361, 746710276, 1830556225, 4462774416, 10904371776, 26485609536, 64593747409, 157115518884

Offset

1,1

Comments

Column 2 of A254854

Links

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

Example

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

Crossrefs

Sequence in context: A064253 A069266 A060678 * A235181 A268773 A250789

Adjacent sequences: A254845 A254846 A254847 * A254849 A254850 A254851

Keyword

nonn

Author

R. H. Hardin, Feb 08 2015

Status

approved