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A196536
Number of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors less than or equal to itself
0
1, 23, 555, 340286, 1202209625, 40385639042743, 11727457709816827017
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OFFSET
1,2
COMMENTS
Diagonal of A196544
LINKS
Table of n, a(n) for n=1..7.
EXAMPLE
Some solutions for n=4
..1..1..3..0....2..1..0..2....1..1..2..0....0..1..3..0....0..1..2..1
..2..4..3..2....1..3..1..2....2..4..3..1....3..2..0..2....3..3..3..1
..2..3..0..1....0..4..2..3....1..2..1..3....0..4..2..3....1..4..4..2
..0..3..2..2....1..2..0..1....1..3..0..1....2..2..1..0....0..1..2..2
CROSSREFS
Sequence in context: A062511 A159664 A158631 * A231261 A242358 A043347
Adjacent sequences: A196533 A196534 A196535 * A196537 A196538 A196539
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 03 2011
STATUS
approved

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Last modified November 7 12:11 EST 2024. Contains 377535 sequences.
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