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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A230592 T(n,k)=Number of nXk 0..5 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 6, and upper left element zero 5
0, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 8, 28, 8, 0, 0, 30, 270, 270, 30, 0, 0, 120, 2966, 7078, 2966, 120, 0, 0, 506, 34684, 225010, 225010, 34684, 506, 0, 0, 2144, 405122, 7476932, 20908278, 7476932, 405122, 2144, 0, 0, 9030, 4682406, 239885668, 1902360932 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,8

COMMENTS

Table starts

.0....0.......0..........0............0............0............0

.0....0.......2..........8...........30..........120..........506

.0....2......28........270.........2966........34684.......405122

.0....8.....270.......7078.......225010......7476932....239885668

.0...30....2966.....225010.....20908278...1902360932.166037342468

.0..120...34684....7476932...1902360932.466409047158

.0..506..405122..239885668.166037342468

.0.2144.4682406.7573457652

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..71

FORMULA

Empirical for column k:

k=1: a(n) = a(n-1)

k=2: a(n) = 5*a(n-1) -5*a(n-2) +5*a(n-3) +8*a(n-4)

k=3: [order 20]

EXAMPLE

Some solutions for n=3 k=4

..0..3..4..5....0..1..2..3....0..5..4..5....0..1..2..1....0..1..0..5

..1..2..1..0....3..4..1..4....1..4..1..0....5..4..3..2....5..2..5..4

..0..3..4..5....2..5..0..5....2..3..2..5....0..1..2..1....4..3..4..3

CROSSREFS

Sequence in context: A167291 A063865 A230275 * A282699 A182107 A037224

Adjacent sequences:  A230589 A230590 A230591 * A230593 A230594 A230595

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Oct 24 2013

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 October 15 00:14 EDT 2019. Contains 328025 sequences. (Running on oeis4.)