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A222970 Number of 1 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
1, 2, 6, 12, 28, 54, 119, 230, 488, 948, 1979, 3860, 7978, 15624, 32072, 63014, 128746, 253588, 516346, 1019072, 2069590, 4091174, 8291746, 16412668, 33210428, 65808044, 132985161, 263755984, 532421062, 1056789662, 2131312530, 4233176854 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=3:

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

CROSSREFS

Row 1 of A222969.

Sequence in context: A290419 A159553 A327727 * A112510 A284449 A011949

Adjacent sequences:  A222967 A222968 A222969 * A222971 A222972 A222973

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 10 2013

STATUS

approved

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Last modified September 25 07:19 EDT 2022. Contains 356959 sequences. (Running on oeis4.)