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A222719 Number of nX3 0..3 arrays with exactly floor(nX3/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
0, 30, 1683, 88552, 2807505, 173596622, 5700425842, 361481561727, 11854580368227, 768495821905378, 25268983469852703, 1660963025457136586, 54720903080516442190, 3632596805120259336310, 119870557565384807413087 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A222722

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..67

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A103917 A196464 A280360 * A089550 A007804 A295588

Adjacent sequences:  A222716 A222717 A222718 * A222720 A222721 A222722

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 03 2013

STATUS

approved

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Last modified November 28 06:42 EST 2021. Contains 349401 sequences. (Running on oeis4.)