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A203396 Number of nX7 0..3 arrays with every nonzero element less than or equal to some NW, E or S neighbor 1
1, 661595, 4711784187, 14710444493905, 45159146324783578, 154961643794311169996, 535800823449864962697227, 1822334263711036605145936237, 6186928248710299499016512591407 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A203397

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..181

EXAMPLE

Some solutions for n=4

..3..0..3..1..1..3..2....2..1..3..2..0..0..3....1..3..0..0..1..3..2

..3..1..3..0..3..3..3....2..2..3..2..1..0..3....2..3..2..2..1..3..2

..3..0..3..2..1..3..2....0..0..3..2..2..3..3....1..3..2..2..1..3..0

..3..3..3..3..0..1..2....2..2..3..3..1..2..3....3..3..3..1..1..3..3

CROSSREFS

Sequence in context: A254495 A254488 A253860 * A234688 A235210 A209596

Adjacent sequences: A203393 A203394 A203395 * A203397 A203398 A203399

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 01 2012

STATUS

approved

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Last modified February 8 08:18 EST 2023. Contains 360136 sequences. (Running on oeis4.)