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A223145 Number of nX3 0..2 arrays with no more than floor(nX3/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order 1
2, 31, 211, 4065, 23376, 487176, 2859044, 61675900, 371133369, 8139180914, 49841557459, 1103204549801, 6833901039820, 152165504230294, 950031309571622, 21243203251932990, 133380148664076565, 2991998436727716610 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A223149
LINKS
EXAMPLE
Some solutions for n=3
..0..1..2....0..1..0....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2
..2..1..0....1..2..0....2..0..0....2..0..1....1..1..0....1..0..2....2..2..2
..0..2..0....0..1..2....1..0..1....1..2..0....0..2..1....2..1..0....0..1..0
CROSSREFS
Sequence in context: A343830 A137626 A134179 * A188225 A164676 A004307
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 16 2013
STATUS
approved

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Last modified March 5 06:03 EST 2024. Contains 370537 sequences. (Running on oeis4.)