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A222901 Number of nX3 0..3 arrays with no more than floor(nX3/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
1, 7, 45, 767, 4909, 119393, 759891, 20299463, 130579169, 3588643955, 23230932391, 647426033879, 4209052934053, 118324983126455, 771976078016995, 21829828686370139, 142850851773130033, 4056660324820606967 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A222906

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3

..0..1..0....0..0..0....0..1..1....0..0..1....0..0..0....0..0..1....0..0..1

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

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

CROSSREFS

Sequence in context: A232789 A203201 A287064 * A175909 A034471 A100024

Adjacent sequences:  A222898 A222899 A222900 * A222902 A222903 A222904

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 09 2013

STATUS

approved

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Last modified July 16 09:13 EDT 2020. Contains 335784 sequences. (Running on oeis4.)