A301911 Number of 7Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

64, 1, 117, 65, 196, 1999, 8781, 104732, 770376, 7398173, 75183520, 712349998, 7178506389, 72042620797, 721879978606, 7250047119979, 72777298549367, 730558484014599, 7332580130417856, 73594615185044259, 738663477116841069

Offset

1,1

Comments

Row 7 of A301906.

Links

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

Example

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

Crossrefs

Cf. A301906.

Sequence in context: A203262 A174927 A303329 * A302155 A351246 A371277

Adjacent sequences: A301908 A301909 A301910 * A301912 A301913 A301914

Keyword

nonn

Author

R. H. Hardin, Mar 28 2018

Status

approved