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A318021
Number of nX5 0..1 arrays with every element unequal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1
16, 95, 419, 2227, 12039, 60157, 304184, 1569163, 8067785, 41794215, 216350270, 1121920799, 5819644170, 30203030342, 156774826962, 813943024542, 4226109266686, 21944484821348, 113952475164535, 591748572069652
OFFSET
1,1
COMMENTS
Column 5 of A318024.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..0..1. .0..0..0..0..0. .0..0..1..1..1. .0..0..1..1..0
..0..1..1..1..1. .0..0..0..1..1. .0..0..1..1..1. .0..0..1..0..1
..1..1..1..1..0. .0..0..0..1..1. .0..0..1..1..0. .0..0..0..1..1
..1..1..1..1..1. .0..0..0..1..1. .0..0..1..1..1. .0..1..1..1..0
..1..1..0..1..0. .1..1..1..1..0. .0..0..1..1..1. .1..0..1..0..0
CROSSREFS
Cf. A318024.
Sequence in context: A317608 A159245 A066487 * A333511 A320406 A241936
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 12 2018
STATUS
approved