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A301614 Number of nX7 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero. 1
8, 1172, 72758, 4422826, 271301458, 16632517333, 1019565752074, 62500458737127, 3831336753439723, 234864521959895889, 14397413152054371201, 882574864133207632568, 54102660842288578973363, 3316543531108585833444946 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 7 of A301615.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..1..1..0..0. .0..0..0..0..1..1..1. .0..0..0..1..1..0..0
..0..0..1..1..1..1..1. .0..0..1..0..1..0..0. .0..0..1..0..1..0..0
..0..0..1..0..0..1..1. .0..0..1..0..1..0..1. .0..0..1..0..0..1..0
..0..0..1..1..1..0..1. .0..0..1..0..0..1..1. .0..0..1..0..0..1..1
..0..0..0..1..0..0..0. .0..0..0..0..0..1..1. .0..0..0..1..1..1..1
CROSSREFS
Cf. A301615.
Sequence in context: A221084 A117084 A201985 * A180767 A240399 A160008
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 24 2018
STATUS
approved

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Last modified February 23 14:24 EST 2024. Contains 370283 sequences. (Running on oeis4.)