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A300369 Number of nX5 0..1 arrays with every element equal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
0, 3, 3, 4, 32, 92, 270, 1262, 3561, 13976, 48859, 173602, 622502, 2233811, 7882027, 28343929, 100832747, 360076171, 1284751998, 4584944102, 16356781324, 58381988677, 208293028674, 743376640816, 2652427350327, 9465170814378 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 5 of A300372.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..1..1. .0..0..0..0..1. .0..0..1..0..0. .0..0..0..0..1
..0..1..0..1..1. .0..1..0..1..1. .0..1..1..0..1. .0..1..0..1..1
..1..1..0..0..0. .1..1..0..0..0. .0..0..0..1..1. .1..1..1..0..0
..0..0..1..1..0. .0..0..1..0..1. .1..1..0..0..1. .0..0..1..0..1
..0..1..1..0..0. .0..1..1..1..1. .1..1..0..1..1. .0..0..1..1..1
CROSSREFS
Cf. A300372.
Sequence in context: A266067 A300368 A306521 * A304296 A076183 A348679
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 04 2018
STATUS
approved

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Last modified April 14 05:31 EDT 2024. Contains 371655 sequences. (Running on oeis4.)