A222972 - OEIS

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.

1, 10, 314, 3140, 53292, 487830, 6811479, 62248790, 767197516, 7042095920, 81955369777, 758479227700, 8507298585600, 79472821382440, 870035427428542, 8203118157997530

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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