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

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