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A222742 Number of nX3 0..3 arrays with exactly floor(nX3/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
0, 32, 2438, 125094, 6821264, 413021606, 24065512554, 1471765337998, 87152464030990, 5404644628233066, 322906836991829172, 20211764295806702232, 1215888385906731445434, 76597296936236782196484 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A222747

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A254458 A185968 A247999 * A077143 A198284 A230573

Adjacent sequences:  A222739 A222740 A222741 * A222743 A222744 A222745

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 04 2013

STATUS

approved

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Last modified June 16 21:55 EDT 2021. Contains 345080 sequences. (Running on oeis4.)