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A199147 Number of nX6 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors 0
6, 2539, 794416, 316561994, 117380324984, 44832664800117, 16925667317073175 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A199149

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A264801 A067630 A181700 * A097871 A210004 A198667

Adjacent sequences:  A199144 A199145 A199146 * A199148 A199149 A199150

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 03 2011

STATUS

approved

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Last modified January 27 22:13 EST 2022. Contains 350654 sequences. (Running on oeis4.)