A222985 Number of n X 7 0..2 arrays with no more than floor(n*7/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

17, 1172, 36987, 4405097, 183010307, 26345532486, 1202086792105, 180821359299832, 8463651301168857, 1290846776123480411, 61103325028133094620, 9391211217321900719984, 447723422606405342204055

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..49

Example

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

Crossrefs

Column 7 of A222986.

Sequence in context: A032629 A232942 A075602 * A229833 A362711 A305872

Adjacent sequences: A222982 A222983 A222984 * A222986 A222987 A222988

Keyword

nonn

Author

R. H. Hardin, Mar 11 2013

Status

approved