A300936 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

64, 1063, 3699, 15292, 77434, 399796, 2038646, 9872494, 49173493, 248913865, 1260900313, 6356938678, 32044722978, 161891392730, 818860503999, 4141939583430, 20949514125632, 105988957211455, 536401470005216

Offset

1,1

Comments

Column 7 of A300937.

Links

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

Example

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

Crossrefs

Cf. A300937.

Sequence in context: A280603 A301322 A300497 * A300880 A301490 A223070

Adjacent sequences: A300933 A300934 A300935 * A300937 A300938 A300939

Keyword

nonn

Author

R. H. Hardin, Mar 16 2018

Status

approved