A209018 Number of nX7 0..3 arrays with no element equal the average of immediate neighbors vertically above, diagonally above and left, and horizontally left of it

2916, 20918008, 148774643618, 1057701934285612, 7521858792951566188, 53490209804089514438574, 380386826513820237531618354, 2705056288752965649168385141630, 19236551636169391849856640820638184

Offset

1,1

Comments

Column 7 of A209019

Links

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

Example

Some solutions for n=4
..1..3..0..1..2..3..2....2..3..1..2..1..2..3....1..3..2..3..0..1..3
..2..0..2..2..1..1..0....3..0..3..3..0..2..3....3..0..0..3..1..3..3
..1..2..2..3..1..0..0....2..1..1..2..1..2..0....2..0..1..2..0..3..0
..3..0..0..1..1..1..3....3..0..3..0..0..2..1....1..2..0..3..0..2..3

Crossrefs

Sequence in context: A203376 A183360 A209046 * A186562 A157935 A081634

Adjacent sequences: A209015 A209016 A209017 * A209019 A209020 A209021

Keyword

nonn

Author

R. H. Hardin Mar 04 2012

Status

approved