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A222972 Number of 4 X (n+1) 0..1 arrays with every row least squares fitting to a positive-slope straight line and every column least squares fitting to a zero- or positive-slope straight line, with a single point array taken as having zero slope. 0
1, 10, 314, 3140, 53292, 487830, 6811479, 62248790, 767197516, 7042095920, 81955369777, 758479227700, 8507298585600, 79472821382440, 870035427428542, 8203118157997530 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

Some solutions for n=3:

  0 0 1 0    1 0 1 1    0 0 1 0    0 0 1 1    0 0 1 1

  0 1 0 1    1 0 1 1    0 0 1 1    0 0 0 1    0 1 0 1

  0 1 1 1    1 0 1 1    0 1 1 1    0 0 0 1    0 0 0 1

  0 0 1 1    1 0 1 1    0 0 1 0    0 1 1 1    0 1 1 1

CROSSREFS

Row 4 of A222969.

Sequence in context: A228188 A041425 A217505 * A119297 A259066 A291561

Adjacent sequences:  A222969 A222970 A222971 * A222973 A222974 A222975

KEYWORD

nonn,more

AUTHOR

R. H. Hardin, Mar 10 2013

STATUS

approved

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Last modified September 24 12:45 EDT 2022. Contains 356932 sequences. (Running on oeis4.)