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

Author

R. H. Hardin, Mar 10 2013

Keywords

• nonn
• more

Examples

			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.