login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A253820 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal sum minus antidiagonal median nondecreasing horizontally and vertically 9
512, 2700, 2700, 12680, 12992, 12680, 47816, 60392, 60392, 47816, 178752, 181070, 214596, 181070, 178752, 618856, 651937, 554638, 554638, 651937, 618856, 2201616, 2008068, 1826190, 1713952, 1826190, 2008068, 2201616, 7686444, 7125170, 5735723 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......512......2700.....12680......47816.....178752.....618856.....2201616

.....2700.....12992.....60392.....181070.....651937....2008068.....7125170

....12680.....60392....214596.....554638....1826190....5735723....19727216

....47816....181070....554638....1713952....5585260...19866443....64664493

...178752....651937...1826190....5585260...20991976...75927303...232090516

...618856...2008068...5735723...19866443...75927303..250052478...681245242

..2201616...7125170..19727216...64664493..232090516..681245242..1124641848

..7686444..23696686..63219653..209048111..662686319.1390601653..2291068882

.27456624..83201751.215108264..630001617.1748296756.3467027641..6153419870

.97621664.284492002.694075512.1924934567.4842751104.8832217221.17431190894

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..241

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 18]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

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

CROSSREFS

Sequence in context: A254483 A254476 A254804 * A253813 A254512 A254819

Adjacent sequences:  A253817 A253818 A253819 * A253821 A253822 A253823

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 14 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 12 12:18 EDT 2020. Contains 335661 sequences. (Running on oeis4.)