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A301357
Number of nX4 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1
2, 15, 34, 101, 320, 1167, 3961, 13974, 49388, 171718, 595933, 2069269, 7184407, 24983410, 87005062, 303301112, 1058018103, 3691794974, 12883245735, 44960338427, 156905033430, 547579453383, 1911021086139, 6669509723637
OFFSET
1,1
COMMENTS
Column 4 of A301361.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..0. .0..0..1..1. .0..1..0..0. .0..0..1..1. .0..0..1..1
..1..1..1..0. .0..1..0..0. .0..1..1..1. .0..1..0..0. .1..0..0..1
..0..1..1..1. .1..0..1..1. .0..0..0..0. .1..0..1..1. .1..1..0..1
..0..1..0..1. .0..1..0..0. .1..1..1..0. .0..1..0..0. .0..1..0..0
..1..1..0..1. .0..0..1..1. .0..0..1..1. .0..1..1..1. .0..1..1..0
CROSSREFS
Cf. A301361.
Sequence in context: A300431 A300765 A300635 * A271909 A346641 A075541
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 19 2018
STATUS
approved