A300471 Number of n X 7 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

64, 5536, 180397, 7121067, 284885784, 11408562672, 456303004550, 18253046515989, 730219136878799, 29212758892049864, 1168662232086807413, 46752555205748619684, 1870345397930689285305, 74823548553594183996315

Offset

1,1

Comments

Column 7 of A300472.

Links

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

Example

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

Crossrefs

Cf. A300472.

Sequence in context: A220578 A067821 A283491 * A326104 A300810 A301449

Adjacent sequences: A300468 A300469 A300470 * A300472 A300473 A300474

Keyword

nonn

Author

R. H. Hardin, Mar 06 2018

Status

approved