A222968 Number of n X 7 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.

54, 534, 28836, 487830, 26342820, 677339136, 41972251734, 1306606331404, 82298403509112, 3041055175823616, 191470088044451700

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=3:
  1 0 0 0 0 1 1    0 0 1 0 0 0 1    1 0 0 0 0 1 1
  0 0 0 0 0 0 1    0 0 0 1 1 0 1    1 0 1 1 0 1 1
  1 0 0 1 1 1 1    0 0 1 0 0 0 1    1 1 0 1 1 1 1

Crossrefs

Column 6 of A222969.

Sequence in context: A192216 A238908 A233364 * A228016 A245833 A254701

Adjacent sequences: A222965 A222966 A222967 * A222969 A222970 A222971

Keyword

nonn,more

Author

R. H. Hardin, Mar 10 2013

Status

approved