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

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A254887 Number of (n+2)X(n+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal median nondecreasing horizontally and vertically 0
 512, 8944, 171400, 4577708, 42268052, 290329276, 1890553676, 6706657300, 27187563600, 107210607174, 372692369806, 1336057750714 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A254894 LINKS EXAMPLE Some solutions for n=3 ..0..1..0..0..1....0..1..0..1..1....0..0..0..0..1....0..0..0..0..0 ..0..0..0..0..0....0..0..0..0..0....0..0..0..1..1....1..0..0..1..0 ..1..1..0..0..1....1..0..0..0..1....1..0..0..1..1....0..0..0..1..0 ..0..1..0..1..1....1..0..0..1..1....0..0..1..1..1....0..0..0..1..0 ..0..0..0..1..0....0..0..0..1..0....0..0..0..1..1....0..0..1..1..1 CROSSREFS Sequence in context: A070057 A017619 A253928 * A256896 A254234 A254546 Adjacent sequences: A254884 A254885 A254886 * A254888 A254889 A254890 KEYWORD nonn AUTHOR R. H. Hardin, Feb 10 2015 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 November 29 01:35 EST 2022. Contains 358421 sequences. (Running on oeis4.)