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A223116 Number of 3Xn 0..2 arrays with exactly floor(3Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
0, 22, 269, 5624, 64346, 1435644, 17231678, 394101698, 4795863215, 111385873044, 1367910381793, 32104125661092, 396732928643199, 9380176155748724, 116431632349956000, 2768141124993190440, 34474283501877795558 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Row 3 of A223114
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0....0..0..0....0..1..0....0..1..0....0..1..2....0..1..1....0..1..1
..1..0..2....0..1..2....1..2..0....0..2..0....0..1..2....1..1..0....2..1..2
..2..0..2....0..1..2....1..0..1....2..1..1....0..0..0....0..2..0....2..0..1
CROSSREFS
Sequence in context: A055756 A128766 A278153 * A125434 A023020 A022650
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 14 2013
STATUS
approved

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Last modified March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)