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A233151 Number of n X n 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally or antidiagonally. 1
3, 24, 432, 17496, 1658232, 367125912, 191184793128, 234385100907480, 677856222475099560, 4627785508146660629232, 74650443539914896103253016, 2846446729148572555427535908448, 256684477494955879310882598953790768 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=4:
..2..2..1..2....1..0..1..2....1..0..1..2....0..1..0..0....0..0..1..2
..1..0..1..0....1..0..1..0....1..2..2..1....0..0..1..0....1..2..1..0
..0..0..0..0....0..0..0..1....1..2..2..1....0..0..1..2....1..0..0..0
..1..0..1..2....1..0..0..1....1..2..2..1....0..0..1..0....1..0..0..1
CROSSREFS
Diagonal of A233155.
Sequence in context: A065761 A374021 A002832 * A236466 A371126 A185970
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 05 2013
STATUS
approved

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Last modified July 14 20:02 EDT 2024. Contains 374323 sequences. (Running on oeis4.)