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A222851 Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order 1
10, 391, 19446, 1020085, 54792022, 2987881000, 164730750373, 9157731030542, 512408255461283, 28820435495127238, 1627922121827975600, 92280373332999109832, 5246771020310646443594, 299086443047065736686909 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A222853

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..45

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A349480 A203774 A024136 * A013405 A013404 A013402

Adjacent sequences:  A222848 A222849 A222850 * A222852 A222853 A222854

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 07 2013

STATUS

approved

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Last modified May 25 21:44 EDT 2022. Contains 354071 sequences. (Running on oeis4.)