A301490 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

64, 1063, 4326, 38558, 594953, 8479276, 116648010, 1642511178, 23269383762, 329448536106, 4665726402829, 66101420939287, 936656562909636, 13273745213136152, 188117185109334762, 2666089573263940480

Offset

1,1

Comments

Column 7 of A301491.

Links

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

Example

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

Crossrefs

Cf. A301491.

Sequence in context: A300497 A300936 A300880 * A223070 A191900 A191494

Adjacent sequences: A301487 A301488 A301489 * A301491 A301492 A301493

Keyword

nonn

Author

R. H. Hardin, Mar 22 2018

Status

approved