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A199249 Number of n X n 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor 0
1, 1, 114, 11223, 68639138, 208100267703 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Diagonal of A199256
LINKS
EXAMPLE
Some solutions for n=4
..0..1..2..3....0..1..2..0....0..1..0..1....0..1..2..3....0..1..2..1
..3..2..3..1....2..3..1..3....1..2..3..2....1..2..0..2....3..0..3..0
..2..0..1..0....0..1..2..1....0..3..2..0....3..1..3..0....2..3..2..1
..3..1..0..2....3..2..0..3....3..1..3..2....1..3..0..2....3..2..1..0
CROSSREFS
Sequence in context: A306194 A112485 A220685 * A199193 A188694 A188507
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 04 2011
STATUS
approved

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Last modified April 20 16:37 EDT 2024. Contains 371845 sequences. (Running on oeis4.)