login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A208405 Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors 1
51, 41914, 40883360, 40039156736, 39216100214432, 38410047476679936, 37620564383817645696, 36847308431734650845696, 36089946042522268966513152, 35348150537672718536490582016, 34621601954234065647421901637632 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A208408

LINKS

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

FORMULA

Empirical: a(n) = 1008*a(n-1) -28108*a(n-2) +138160*a(n-3) -223680*a(n-4) +168192*a(n-5) -55296*a(n-6) for n>7

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Sequence in context: A241117 A255832 A208198 * A208412 A198904 A238567

Adjacent sequences:  A208402 A208403 A208404 * A208406 A208407 A208408

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 26 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 11 15:10 EDT 2022. Contains 356066 sequences. (Running on oeis4.)