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A205089 Number of (n+1)X(n+1) 0..3 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock equal to the number in all its horizontal and vertical neighbors 1
256, 13116, 4251766, 6997750028, 56016870922512, 2198408614173601972, 426069670428664499911552, 408397032103596887991434131888, 1937279907224716538436705741462507484 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Diagonal of A205097
LINKS
EXAMPLE
Some solutions for n=4
..3..1..2..0..1....1..3..3..1..0....2..2..3..0..3....1..1..0..2..1
..2..3..2..3..0....0..0..3..3..0....0..3..1..2..2....0..3..1..0..2
..3..1..3..0..2....1..0..0..1..1....3..2..3..0..3....2..1..2..2..0
..0..3..0..3..2....1..1..0..0..1....2..3..0..3..2....0..3..0..3..2
..1..0..1..1..3....3..1..1..0..0....3..0..3..1..3....1..0..1..1..3
CROSSREFS
Sequence in context: A224967 A205652 A284032 * A239443 A240932 A238073
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2012
STATUS
approved

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Last modified September 23 13:48 EDT 2023. Contains 365551 sequences. (Running on oeis4.)