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A303407
Number of nX5 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
1
3, 27, 100, 547, 4013, 21361, 115770, 803911, 4667376, 27684643, 182192785, 1120872960, 6916763577, 44766799474, 282088259954, 1776639929407, 11435967743483, 72802740854480, 463125006110247, 2975736132751591
OFFSET
1,1
COMMENTS
Column 5 of A303410.
LINKS
EXAMPLE
Some solutions for n=5
..0..1..0..1..0. .0..1..0..1..1. .0..1..0..1..1. .0..0..1..0..1
..0..0..1..0..0. .1..0..0..0..1. .0..0..1..0..0. .1..1..1..1..0
..1..1..0..1..1. .1..1..0..1..0. .1..1..0..1..0. .1..1..1..1..1
..0..1..0..1..0. .0..0..0..0..1. .1..1..1..1..0. .0..0..1..0..0
..0..0..0..0..0. .1..1..0..1..1. .0..0..1..0..0. .0..1..1..1..0
CROSSREFS
Cf. A303410.
Sequence in context: A343105 A200977 A302525 * A173491 A195799 A297662
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 23 2018
STATUS
approved