A222992 Number of 7Xn 0..2 arrays with no more than floor(7Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

365, 8058, 227569, 15904038, 433151066, 40023605408, 1202086792105, 121468616257860, 3927579044562335, 421192112421834801, 14401746064508294622

Offset

1,1

Comments

Row 7 of A222986

Links

Table of n, a(n) for n=1..11.

Example

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

Crossrefs

Sequence in context: A275130 A274727 A175113 * A276253 A233116 A208433

Adjacent sequences: A222989 A222990 A222991 * A222993 A222994 A222995

Keyword

nonn

Author

R. H. Hardin, Mar 11 2013

Status

approved