login
A198913
Number of n X 7 0..7 arrays with values 0..7 introduced in row major order and no element equal to any horizontal or vertical neighbor.
2
203, 10856948, 3352514013159, 1243368053336112649, 467181941240736711604077, 175702802690666247458883923440, 66084692925071529966599521403836686, 24855655340700384655492554800723374323095, 9348667576846602621032033514210811069676125541
OFFSET
1,1
LINKS
EXAMPLE
Some solutions with values 0 to 7 for n=3
..0..1..0..2..0..1..3....0..1..0..2..3..4..2....0..1..0..2..0..1..3
..1..0..2..0..4..2..5....1..0..2..0..4..5..0....1..0..2..0..4..3..5
..0..1..0..6..7..3..0....0..1..0..4..5..6..7....0..1..0..6..7..0..1
CROSSREFS
Column 7 of A198914.
Sequence in context: A208471 A348823 A198722 * A224983 A138605 A260975
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 31 2011
EXTENSIONS
Terms a(8) and beyond from Andrew Howroyd, Mar 12 2023
STATUS
approved