A255076 Number of (n+2)X(2+2) 0..1 arrays with no 3x3 subblock diagonal sum one and no antidiagonal sum one

676, 2704, 14161, 66049, 309136, 1485961, 7070281, 33686416, 161417025, 772006225, 3690562500, 17654436900, 84443710464, 403869147049, 1931769194161, 9239867281225, 44194454747881, 211385283419025, 1011072102969600

Offset

1,1

Comments

Column 2 of A255082

Links

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

Example

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

Crossrefs

Cf. A255082

Sequence in context: A300984 A185794 A253330 * A253323 A281405 A204036

Adjacent sequences: A255073 A255074 A255075 * A255077 A255078 A255079

Keyword

nonn

Author

R. H. Hardin, Feb 14 2015

Status

approved