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A203049 Number of n X n 0..5 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor 0
1, 286, 1055370, 78243755382, 168179371998322692, 10124772353743869083346802 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A203057

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=5

..2..1..3..2..5....4..3..1..2..2....0..5..3..1..5....3..5..4..2..1

..3..0..5..4..5....4..5..0..4..5....5..5..1..2..5....3..5..4..3..4

..3..2..5..5..3....4..5..4..5..5....1..0..5..1..5....2..2..2..1..4

..2..2..5..0..2....2..4..4..0..1....2..3..5..5..4....3..5..1..0..2

..2..0..1..2..2....4..4..4..1..0....3..3..4..4..3....3..5..5..1..2

CROSSREFS

Sequence in context: A130433 A140926 A295447 * A306788 A259402 A157997

Adjacent sequences:  A203046 A203047 A203048 * A203050 A203051 A203052

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 28 2011

STATUS

approved

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Last modified July 2 08:02 EDT 2020. Contains 335398 sequences. (Running on oeis4.)