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A300643
Number of nX5 0..1 arrays with every element equal to 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
1
0, 9, 30, 316, 2998, 28089, 268615, 2552014, 24338903, 231985285, 2211326264, 21081277233, 200957956858, 1915723519711, 18262175095417, 174090604742721, 1659575837493437, 15820464143773812, 150813856777262673
OFFSET
1,2
COMMENTS
Column 5 of A300646.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..1..1..0. .0..0..0..1..1. .0..0..0..0..0. .0..0..0..1..1
..0..0..1..0..0. .0..0..1..1..1. .0..0..0..0..1. .0..0..1..0..1
..1..1..1..0..1. .1..1..0..0..1. .1..1..1..1..1. .1..1..0..0..1
..1..0..0..1..1. .1..0..0..0..1. .1..0..0..1..0. .1..1..0..1..1
..0..0..1..1..1. .1..1..1..1..1. .0..0..0..0..0. .1..1..1..1..1
CROSSREFS
Cf. A300646.
Sequence in context: A319839 A274998 A000440 * A161684 A294404 A298587
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 10 2018
STATUS
approved