The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A223224 Number of nX5 0..1 arrays with all rows and columns having a nonnegative second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative 0
 19, 361, 1036, 26376, 278904, 4466304, 67584976, 1093365880, 17888793702, 382511445066, 6457494717192, 111640301736128, 2145914064012167, 44670752146501913 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 5 of A223227 LINKS Table of n, a(n) for n=1..14. EXAMPLE Some solutions for n=3 ..1..0..0..0..1....1..0..0..0..1....1..1..1..1..1....1..1..1..1..1 ..1..0..0..0..0....0..0..0..0..1....1..0..0..0..0....1..0..0..1..0 ..1..0..1..0..1....0..1..0..0..1....1..1..0..0..0....1..1..1..1..1 CROSSREFS Sequence in context: A208504 A207877 A207680 * A207893 A207883 A207760 Adjacent sequences: A223221 A223222 A223223 * A223225 A223226 A223227 KEYWORD nonn AUTHOR R. H. Hardin Mar 18 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.

Last modified September 8 12:12 EDT 2024. Contains 375753 sequences. (Running on oeis4.)