A301530 Number of nX7 0..1 arrays with every element equal to 0, 2, 3, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 304, 7640, 339956, 14890200, 681538595, 31363814530, 1449439465725, 67069319310675, 3105774311254509, 143847525643175638, 6663123840652391073, 308649484519717755352, 14297467051864049996062, 662299666745948218632443

Offset

1,2

Comments

Column 7 of A301531.

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..0. .0..0..0..1..1..1..1. .0..0..0..0..0..1..1
..0..0..0..1..0..0..0. .0..0..0..1..1..1..1. .0..0..0..0..0..1..0
..0..0..1..1..1..0..0. .0..0..1..1..1..0..0. .0..0..1..0..0..0..0
..0..0..0..1..1..0..0. .0..0..0..0..0..0..0. .0..0..0..0..1..0..0
..0..0..0..1..1..0..1. .0..0..0..1..0..0..1. .0..0..0..1..1..0..1

Crossrefs

Cf. A301531.

Sequence in context: A300538 A300965 A300922 * A172228 A281329 A293092

Adjacent sequences: A301527 A301528 A301529 * A301531 A301532 A301533

Keyword

nonn

Author

R. H. Hardin, Mar 23 2018

Status

approved