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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A253407 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock diagonal maximum plus antidiagonal minimum unequal to its neighbors horizontally, vertically and ne+sw antidiagonally 9
81, 480, 480, 2890, 2192, 2890, 17560, 8168, 8168, 17560, 106540, 37828, 27362, 37828, 106540, 646240, 158472, 108950, 108950, 158472, 646240, 3920448, 638602, 367348, 403698, 367348, 638602, 3920448, 23781448, 2763096, 1489310, 1739014 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........81.......480......2890......17560......106540.......646240......3920448

.......480......2192......8168......37828......158472.......638602......2763096

......2890......8168.....27362.....108950......367348......1489310......5662124

.....17560.....37828....108950.....403698.....1739014......7437150.....27085902

....106540....158472....367348....1739014.....7257328.....30756372....139685535

....646240....638602...1489310....7437150....30756372....196170260....954233428

...3920448...2763096...5662124...27085902...139685535....954233428...4643086490

..23781448..11635116..19137326..115826070...611083732...4184013494..27322067530

.144267352..48192624..76649188..489226254..2505801666..23948788480.163912344968

.875147104.204426054.290244550.1807771102.11760240950.123736222078.848291663906

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..480

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 10] for n>11

k=2: [order 40] for n>42

k=3: [order 56] for n>63

k=4: [order 60] for n>69

EXAMPLE

Some solutions for n=3 k=4

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

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

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

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

CROSSREFS

Sequence in context: A236775 A205293 A205286 * A253400 A250620 A237082

Adjacent sequences:  A253404 A253405 A253406 * A253408 A253409 A253410

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Dec 31 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 26 02:35 EDT 2019. Contains 323579 sequences. (Running on oeis4.)