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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A204415 Number of (n+2)X8 0..2 arrays with every 3X3 subblock having three strictly increasing elements in a row horizontally or vertically, exactly one way 1
254913953, 395943745, 422397021, 1122887052, 1364559057, 2050960896, 13168291392, 115434720000, 978463169280, 8406274955328, 67649125363200, 567027453966336, 4851531476034048, 39033529900574976, 327172939042111488 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A204417

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 577*a(n-3) for n>17

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A119860 A210683 A271111 * A246224 A205934 A231202

Adjacent sequences:  A204412 A204413 A204414 * A204416 A204417 A204418

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 15 2012

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 September 15 12:22 EDT 2019. Contains 327078 sequences. (Running on oeis4.)