A222965 Number of n X 4 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.

6, 16, 96, 314, 1884, 7344, 46512, 199912, 1281096, 6018524, 38837844, 192182076, 1239097956, 6379184870, 40998506544, 217140146844, 1387598473608, 7510403679888, 47773334036628, 262699726452550, 1662636615068856

Offset

1,1

Links

Table of n, a(n) for n=1..21.

Example

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

Crossrefs

Column 3 of A222969.

Sequence in context: A210370 A266180 A229566 * A009354 A034191 A368875

Adjacent sequences: A222962 A222963 A222964 * A222966 A222967 A222968

Keyword

nonn,more

Author

R. H. Hardin, Mar 10 2013

Status

approved