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A200800 Number of nX7 0..3 arrays with values 0..3 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors 0
715, 9676364, 122478253815, 1557479347400065, 19804473216531794553, 251826890612151285556718, 3202145671418507455058837791 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A200801

LINKS

Table of n, a(n) for n=1..7.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A208871 A208878 A208174 * A208200 A208407 A208414

Adjacent sequences: A200797 A200798 A200799 * A200801 A200802 A200803

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 22 2011

STATUS

approved

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Last modified December 8 03:48 EST 2022. Contains 358672 sequences. (Running on oeis4.)