login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A223177 Number of (n+2)X5 0..1 arrays with all rows and columns having a strictly positive second derivative in a quadratic least squares fit 0
0, 40, 2076, 48316, 620568, 14777316, 246091276, 3081824360, 43744483080, 658808677292, 8732713535100, 101911005390840, 1638761493877308, 20319539313941196, 274686278842189276 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A223179

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Some solutions for n=2

..1..1..0..1..1....1..1..0..1..1....1..1..0..1..1....1..0..1..1..1

..1..0..0..1..0....0..0..0..0..1....1..0..0..0..0....0..0..0..1..1

..0..0..0..0..1....1..0..0..0..0....0..0..0..0..1....1..0..0..0..0

..1..0..1..1..1....1..0..1..0..1....1..1..1..0..1....1..1..0..1..1

CROSSREFS

Sequence in context: A189550 A300116 A060056 * A140729 A003741 A263553

Adjacent sequences:  A223174 A223175 A223176 * A223178 A223179 A223180

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 17 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 18 05:40 EST 2019. Contains 320245 sequences. (Running on oeis4.)