A223752 Number of 1X(n+1) 0..3 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

6, 24, 117, 456, 1962, 7660, 31897, 125240, 514300, 2027832, 8266707, 32688296, 132665572, 525661108, 2127110678, 8440975288, 34086061208, 135418512296, 546011521445, 2171164829984, 8744100796746, 34795052216800, 140006637363629

Offset

1,1

Comments

Row 1 of A223751

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for n=3
..0..2..1..2....1..3..0..3....1..1..3..3....0..3..3..2....1..3..1..3

Crossrefs

Sequence in context: A187668 A273813 A293257 * A293236 A217193 A109583

Adjacent sequences: A223749 A223750 A223751 * A223753 A223754 A223755

Keyword

nonn

Author

R. H. Hardin Mar 27 2013

Status

approved