The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A223650 Number of (n+2)X6 0..1 arrays with all rows having a nonnegative second derivative, and all and columns having a positive second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative 0
207, 3237, 427313, 22982345, 1119629805, 50246141433, 2434395476789, 75307144658325, 3271323310834015 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A223652
LINKS
EXAMPLE
Some solutions for n=3
..1..0..1..1..1..1....1..0..1..1..1..1....1..1..1..0..0..1....1..1..0..0..1..1
..0..0..0..0..0..1....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0
..1..0..0..1..1..0....1..0..0..0..1..0....1..1..1..0..0..0....1..0..0..0..1..0
..0..0..1..0..0..1....1..0..0..1..0..0....0..0..0..0..0..0....1..0..0..1..0..0
..1..1..0..1..1..1....1..1..0..1..1..1....1..1..1..1..1..1....1..1..1..1..1..1
CROSSREFS
Sequence in context: A205198 A205194 A204868 * A232346 A052093 A103477
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 25 2013
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 30 17:56 EDT 2024. Contains 372971 sequences. (Running on oeis4.)