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A183793 1/4 the number of (n+1) X (n+1) 0..3 arrays with no 2 X 2 subblock having sum 6. 0
53, 31541, 209636605, 15624102535570, 13038188765075658693, 121880956287359200992546463 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A183802.
LINKS
EXAMPLE
Some solutions for 3 X 3:
..2..2..0....1..0..3....1..2..0....0..0..2....2..1..3....0..1..0....2..3..3
..2..1..1....2..2..3....0..1..1....3..2..1....3..3..1....1..0..1....3..3..2
..3..3..3....3..0..2....1..3..0....3..2..3....3..1..3....0..1..2....2..3..1
CROSSREFS
Cf. A183802.
Sequence in context: A267950 A268097 A169595 * A367766 A336440 A368298
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 07 2011
STATUS
approved

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Last modified July 14 04:38 EDT 2024. Contains 374291 sequences. (Running on oeis4.)