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!)
A213984 Number of n X n 0..2 matrices whose square is also a 0..2 matrix 0
2, 24, 1003, 120133, 35799856, 24651985100 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A213990

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A062029 A122551 A136524 * A268311 A330087 A307157

Adjacent sequences:  A213981 A213982 A213983 * A213985 A213986 A213987

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 30 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 25 05:01 EST 2020. Contains 332217 sequences. (Running on oeis4.)