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A222830 Number of nX3 0..3 arrays with exactly floor(nX3/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order 1
0, 32, 2120, 114782, 5459252, 346343088, 17812721025, 1142470649401, 58980648163832, 3852418637358246, 200706673436292108, 13243427433214319023, 693625799476691177636, 46113394821687632448294, 2425015336246882407219638 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A222832

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..63

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A268054 A268077 A202547 * A079202 A294607 A294953

Adjacent sequences:  A222827 A222828 A222829 * A222831 A222832 A222833

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 06 2013

STATUS

approved

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Last modified June 25 12:03 EDT 2022. Contains 354851 sequences. (Running on oeis4.)