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A200799 Number of nX6 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 1
187, 622645, 2060918000, 6852264918471, 22781978610167987, 75743730886453371522, 251826890612151285556718, 837254535307721417534184492, 2783639010978210077196779661724 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A200801

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..28

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A208870 A208877 A208173 * A241118 A208199 A208406

Adjacent sequences: A200796 A200797 A200798 * A200800 A200801 A200802

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 22 2011

STATUS

approved

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Last modified December 4 16:09 EST 2022. Contains 358558 sequences. (Running on oeis4.)