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A203459 Number of nX7 0..2 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 1
1, 686, 237999, 44974778, 9441977403, 2078403848722, 449985495293440, 97229907706009899, 21076066091178687992, 4568715563183005120358, 989906518295763028607606, 214487030281717487899262669 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 7 of A203460

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..95

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Sequence in context: A232199 A222751 A234817 * A101944 A045150 A296811

Adjacent sequences:  A203456 A203457 A203458 * A203460 A203461 A203462

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 02 2012

STATUS

approved

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Last modified October 26 21:33 EDT 2021. Contains 348269 sequences. (Running on oeis4.)