A303329 Number of 7Xn 0..1 arrays with every element equal to 0, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 1, 64, 3, 204, 136, 2956, 3929, 69328, 130531, 2005898, 4227664, 61153964, 138433606, 1895471346, 4533018431, 59124000419, 148573817239, 1850543645961, 4870321182842, 58066023583621, 159666967568560, 1825934714066510

Offset

1,1

Comments

Row 7 of A303325.

Links

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

Example

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

Crossrefs

Cf. A303325.

Sequence in context: A085339 A203262 A174927 * A301911 A302155 A351246

Adjacent sequences: A303326 A303327 A303328 * A303330 A303331 A303332

Keyword

nonn

Author

R. H. Hardin, Apr 21 2018

Status

approved