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!)
A203334 Number of nX4 0..5 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 1
1, 161, 27056, 2224079, 156011082, 12492984999, 1066362412766, 89890925664626, 7505491171476277, 629157090925887686, 52957694264102993755, 4460957940319875997958, 375762142634174553990100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A203338

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

..1..1..1..0....0..0..3..3....3..3..3..3....4..4..1..1....4..4..4..4

CROSSREFS

Sequence in context: A207232 A207225 A207012 * A272355 A278891 A232294

Adjacent sequences: A203331 A203332 A203333 * A203335 A203336 A203337

KEYWORD

nonn

AUTHOR

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 23 23:09 EDT 2023. Contains 361454 sequences. (Running on oeis4.)