A301827 Number of 6Xn 0..1 arrays with every element equal to 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.

0, 89, 32, 457, 4785, 31061, 333335, 2626219, 23877827, 205351902, 1801313687, 15687547616, 136936362641, 1194708417693, 10425856252982, 90962890652095, 793785856101375, 6926025279583683, 60436457205654289, 527344354745821834

Offset

1,2

Comments

Row 6 of A301823.

Links

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

Example

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

Crossrefs

Cf. A301823.

Sequence in context: A187812 A075483 A220135 * A262093 A033409 A152160

Adjacent sequences: A301824 A301825 A301826 * A301828 A301829 A301830

Keyword

nonn

Author

R. H. Hardin, Mar 27 2018

Status

approved