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A223312 Number of nX3 0..1 arrays with successive rows and columns fitting to straight lines with nondecreasing slope, with a single point array taken as having zero slope 1
8, 26, 136, 454, 2096, 7490, 32536, 118190, 495984, 1829612, 7534896, 28093022, 114631272, 431107760, 1749879648, 6626934528, 26812323712, 102112441820, 412247828720, 1577225857288, 6357677720504, 24416496168472, 98306183091960 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A223317

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..55

EXAMPLE

Some solutions for n=4

..0..0..0....1..0..0....1..0..0....1..1..0....1..0..0....0..0..0....1..1..0

..0..0..0....1..0..0....1..1..1....1..0..1....0..1..0....0..0..1....1..0..1

..0..0..0....0..0..0....1..1..1....1..0..1....1..1..1....0..1..1....0..0..0

..0..1..1....0..0..0....1..0..1....0..0..1....0..0..1....0..0..1....0..0..1

CROSSREFS

Sequence in context: A220713 A260962 A274733 * A194997 A089064 A240291

Adjacent sequences:  A223309 A223310 A223311 * A223313 A223314 A223315

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 19 2013

STATUS

approved

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Last modified November 16 21:32 EST 2018. Contains 317275 sequences. (Running on oeis4.)