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!)
A238510 Number of (n+1)X(1+1) 0..3 arrays with no element equal to all horizontal neighbors or equal to all vertical neighbors, and new values 0..3 introduced in row major order 1
4, 25, 295, 3113, 33837, 365740, 3958594, 42834071, 463516595, 5015744275, 54275869563, 587324222844, 6355490845488, 68773364113485, 744203045653967, 8053091185427477, 87143257529984401, 942985390024669100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A238515

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-1) +13*a(n-2) -44*a(n-3) -7*a(n-4) +14*a(n-5)

EXAMPLE

Some solutions for n=5

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

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

..1..3....1..3....1..0....2..0....1..3....1..2....1..3....3..2....3..0....0..1

..3..2....3..2....3..0....0..2....3..1....0..1....3..0....1..0....0..1....3..0

..1..3....2..3....1..2....3..1....2..0....3..0....1..0....0..3....3..0....2..0

..2..0....0..2....2..3....0..3....1..2....0..1....3..2....3..0....0..3....1..3

CROSSREFS

Sequence in context: A320569 A058791 A216660 * A222982 A259591 A093959

Adjacent sequences:  A238507 A238508 A238509 * A238511 A238512 A238513

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 27 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 January 28 03:49 EST 2020. Contains 331317 sequences. (Running on oeis4.)