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A198660 Number of nX6 0..7 arrays with values 0..7 introduced in row major order and each element equal to at least one horizontal or vertical neighbor 0
6, 3521, 3053286, 6046334324, 17510670291958 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A198661

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions with all values 0 to 7 for n=3

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

..5..5..1..2..3..4....3..4..5..5..6..3....4..4..5..2..2..3....0..1..4..4..5..6

..5..6..6..7..7..4....3..4..7..7..6..3....6..6..5..5..7..7....7..7..0..0..5..6

CROSSREFS

Sequence in context: A198706 A198625 A198653 * A048542 A140173 A158663

Adjacent sequences:  A198657 A198658 A198659 * A198661 A198662 A198663

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 28 2011

STATUS

approved

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Last modified April 3 17:03 EDT 2020. Contains 333197 sequences. (Running on oeis4.)