A300972 Number of nX7 0..1 arrays with every element equal to 1, 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 1568, 122043, 8926774, 673550354, 50812633429, 3830408271334, 288757143760689, 21768367076769721, 1641036899910007681, 123711666663261563598, 9326162991014646538811, 703064781446983855135971

Offset

1,1

Comments

Column 7 of A300973.

Links

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

Example

Some solutions for n=5
..0..0..0..0..0..1..1. .0..0..0..0..0..1..1. .0..0..0..0..1..1..1
..0..0..0..1..0..1..1. .0..0..0..0..1..1..0. .0..0..0..0..1..0..0
..0..0..1..1..1..0..0. .0..0..0..1..1..0..0. .0..0..0..1..1..0..1
..0..1..0..0..1..1..1. .0..0..1..0..1..1..1. .0..0..1..0..1..0..1
..0..0..0..1..1..1..1. .0..1..1..0..0..1..1. .0..1..1..0..0..0..0

Crossrefs

Cf. A300973.

Sequence in context: A114617 A162014 A300545 * A300929 A229150 A160231

Adjacent sequences: A300969 A300970 A300971 * A300973 A300974 A300975

Keyword

nonn

Author

R. H. Hardin, Mar 17 2018

Status

approved