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!)
A223049 Number of nX3 0..3 arrays with exactly floor(nX3/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1
0, 44, 1682, 101573, 4505726, 286019636, 13029003006, 847775163675, 39163069348499, 2586615582072818, 120546656751917002, 8041164730409837733, 377031919338288517436, 25328506526109972349940, 1192869061178928489347148 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A223052

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..114

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A130645 A004340 A231262 * A278793 A004295 A162882

Adjacent sequences:  A223046 A223047 A223048 * A223050 A223051 A223052

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 13 2013

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 21 01:46 EDT 2021. Contains 347596 sequences. (Running on oeis4.)