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A199035 Number of nX2 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to one or two horizontal or vertical neighbors 1
0, 0, 3, 12, 29, 143, 877, 3516, 8987, 81112, 342188, 667215, 7467547, 32878290, 56393050, 697859958, 3145355560, 5126416780, 66563431854, 303713138234, 484994209944, 6455395706354, 29679649731124, 47028010467376 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Column 2 of A199041
LINKS
EXAMPLE
Some solutions for n=4
..0..0....0..1....0..1....0..1....0..0....0..0....0..0....0..0....0..0....0..0
..1..0....0..1....0..1....0..1....1..0....1..1....0..1....1..2....0..1....1..1
..1..1....0..1....0..2....2..1....1..2....2..1....2..1....1..2....1..1....1..2
..2..2....2..2....2..2....2..2....1..2....2..2....2..1....1..2....2..2....2..2
CROSSREFS
Sequence in context: A215640 A104353 A001860 * A101459 A051408 A331080
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 02 2011
STATUS
approved

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Last modified June 23 00:47 EDT 2024. Contains 373629 sequences. (Running on oeis4.)