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

 

Logo

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!)
A237567 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the upper median plus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 9
81, 316, 316, 1256, 1536, 1256, 4984, 7356, 7356, 4984, 19900, 36168, 44828, 36168, 19900, 78144, 175768, 272828, 272828, 175768, 78144, 311512, 848720, 1668300, 2161168, 1668300, 848720, 311512, 1227648, 4121060, 10006572, 16418704 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.......81.......316........1256.........4984..........19900...........78144

......316......1536........7356........36168.........175768..........848720

.....1256......7356.......44828.......272828........1668300........10006572

.....4984.....36168......272828......2161168.......16418704.......126608036

....19900....175768.....1668300.....16418704......159014170......1518590620

....78144....848720....10006572....126608036.....1518590620.....18615658788

...311512...4121060....61521086....977290740....14891233160....228407442348

..1227648..20050460...369916012...7535608804...142803584684...2815624842216

..4896848..97225972..2269219612..58063606256..1403992115612..34622654326396

.19273664.471641072.13640047444.448289864392.13464379623752.426711928933956

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..127

FORMULA

Empirical for column k:

k=1: a(n) = 4*a(n-2) +140*a(n-4) +632*a(n-6) +864*a(n-8) for n>9

k=2: [order 17]

k=3: [order 60] for n>63

EXAMPLE

Some solutions for n=3 k=4

..1..0..0..1..1....0..0..1..0..1....0..2..2..1..2....0..1..1..2..2

..0..1..0..2..1....0..0..1..1..0....1..2..2..1..0....0..2..0..2..1

..2..1..0..2..1....1..1..2..2..1....0..1..1..1..0....0..2..1..1..2

..2..1..2..1..0....0..2..0..0..2....0..1..0..0..0....2..1..0..0..1

CROSSREFS

Sequence in context: A237696 A237557 A237550 * A237560 A237332 A237325

Adjacent sequences: A237564 A237565 A237566 * A237568 A237569 A237570

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 09 2014

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 December 5 21:40 EST 2022. Contains 358594 sequences. (Running on oeis4.)