A222974 Number of 6 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, 36, 7344, 264384, 21852384, 677339136, 41252032201, 1279444594428, 63987904860942, 2004349575346776

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Row 6 of A222969.

Sequence in context: A068272 A068284 A145248 * A013739 A203052 A054407

Adjacent sequences: A222971 A222972 A222973 * A222975 A222976 A222977

Keyword

nonn,more

Author

R. H. Hardin, Mar 10 2013

Status

approved