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!)
A254819 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically 8
512, 2703, 2703, 12730, 15848, 12730, 55904, 95110, 95110, 55904, 221858, 522294, 748444, 522294, 221858, 833037, 2691838, 5525547, 5525547, 2691838, 833037, 2977462, 13380696, 37573674, 52855290, 37573674, 13380696, 2977462, 10225464 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......512.......2703.......12730.........55904.........221858...........833037

.....2703......15848.......95110........522294........2691838.........13380696

....12730......95110......748444.......5525547.......37573674........247721056

....55904.....522294.....5525547......52855290......463784139.......4043573364

...221858....2691838....37573674.....463784139.....5252066348......59733054453

...833037...13380696...247721056....4043573364....59733054453.....913402797416

..2977462...64480314..1555784900...32502418874...617600165386...12435035618491

.10225464..303930381..9507310251..255406348232..6259013485112..165816689112144

.34028886.1410213321.56427672574.1922225812231.60421295621544.2098552515955862

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..179

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 58] for n>59

EXAMPLE

Some solutions for n=2 k=4

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

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

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

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

CROSSREFS

Column 1 is A254505

Sequence in context: A253820 A253813 A254512 * A254505 A253993 A258910

Adjacent sequences:  A254816 A254817 A254818 * A254820 A254821 A254822

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 08 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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 29 06:25 EDT 2022. Contains 357082 sequences. (Running on oeis4.)