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!)
A196640 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,4,2,0,3 for x=0,1,2,3,4 1
1, 161, 2716, 61040, 1359317, 30213746, 665532327, 14699136810, 324580294214, 7174373488843, 158475010595627, 3501133164138965, 77351575703021875, 1708953141696773382, 37756465985372614724, 834167580535337854517 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Every 0 is next to 0 1's, every 1 is next to 1 4's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 3's

Column 7 of A196641

LINKS

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

EXAMPLE

Some solutions for n=4

..0..0..0..3..0..0..0....0..0..3..0..3..0..0....0..0..0..3..0..0..0

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

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

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

CROSSREFS

Sequence in context: A200869 A200883 A196635 * A232072 A278205 A197089

Adjacent sequences:  A196637 A196638 A196639 * A196641 A196642 A196643

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 04 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 21 16:31 EDT 2021. Contains 347598 sequences. (Running on oeis4.)