A222973 Number of 5 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, 20, 1884, 37680, 1492176, 26342820, 810566001, 14317221700, 374392387808, 6675906932160, 162189676788683, 2927729818922000, 67871228115916800, 1241683361279242560

Offset

1,2

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Row 5 of A222969.

Sequence in context: A330196 A172556 A246619 * A267575 A072818 A123479

Adjacent sequences: A222970 A222971 A222972 * A222974 A222975 A222976

Keyword

nonn,more

Author

R. H. Hardin, Mar 10 2013

Status

approved