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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A198908 Number of nX2 0..7 arrays with values 0..7 introduced in row major order and no element equal to any horizontal or vertical neighbor 3
1, 4, 34, 500, 10867, 313132, 10856948, 418689772, 17067989413, 715189507700, 30371156968582, 1298083132473604, 55654030558406039, 2389712969490386908, 102686352402421016536, 4414019789796312628796, 189771542890022982723145 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A198914

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n) = 88*a(n-1) -2613*a(n-2) +33232*a(n-3) -184531*a(n-4) +400344*a(n-5) -246519*a(n-6)

EXAMPLE

Some solutions with values 0 to 7 for n=5

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

..2..3....2..3....1..2....2..3....2..3....2..3....2..3....2..3....2..3....2..3

..4..5....4..2....3..4....4..5....4..5....4..5....4..5....4..5....4..5....4..5

..0..3....1..5....5..6....2..3....6..7....3..6....6..2....6..1....0..6....6..7

..6..7....6..7....2..7....6..7....7..1....7..3....2..7....5..7....7..1....2..4

CROSSREFS

Sequence in context: A274244 A002105 A198717 * A207864 A222077 A081972

Adjacent sequences:  A198905 A198906 A198907 * A198909 A198910 A198911

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 31 2011

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified February 20 10:45 EST 2018. Contains 299385 sequences. (Running on oeis4.)