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A302375 Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero. 0
0, 3, 76, 4640, 1089035, 849467774, 2195619257236, 18920034863521166, 543629426918828295527 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A302381.
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..0. .0..0..0..1..0. .0..0..0..0..0. .0..0..0..1..0
..0..1..0..0..1. .0..0..0..0..1. .0..0..1..1..0. .0..1..1..0..1
..0..0..1..1..1. .1..0..1..1..0. .1..0..0..0..0. .0..0..0..0..0
..1..0..0..0..1. .1..1..0..0..0. .0..1..1..0..0. .1..1..0..1..0
..0..1..0..0..0. .0..0..1..1..1. .1..0..1..1..1. .1..1..1..1..1
CROSSREFS
Cf. A302381.
Sequence in context: A141103 A300386 A054747 * A232030 A054950 A335722
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 06 2018
STATUS
approved

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Last modified July 15 12:56 EDT 2024. Contains 374332 sequences. (Running on oeis4.)