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A204343 Number of (n+2) X (n+2) 0..3 arrays with no 3 X 3 subblock having three equal diagonal elements or three equal antidiagonal elements, and new values 0..3 introduced in row major order. 0
9672, 109655775, 16256855591536, 31112427702110512128, 769885056390910177755092784, 246208690739288821726563895377926727 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A204351.
LINKS
EXAMPLE
Some solutions for n=3
..0..1..0..2..1....0..0..0..0..0....0..1..0..2..0....0..1..1..0..0
..0..3..3..3..3....1..2..3..2..3....3..3..0..1..3....0..2..0..0..2
..3..2..1..3..1....1..1..1..3..3....2..1..1..2..1....1..1..3..1..0
..3..0..0..1..0....3..1..0..1..1....1..0..2..0..3....0..1..0..2..3
..2..0..2..1..2....3..2..3..0..2....0..0..2..1..1....2..1..2..0..3
CROSSREFS
Cf. A204351.
Sequence in context: A238036 A204351 A204344 * A068362 A246228 A234819
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 14 2012
STATUS
approved

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Last modified July 22 00:58 EDT 2024. Contains 374478 sequences. (Running on oeis4.)