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!)
A213986 Number of n X n 0..4 matrices whose square is also a 0..4 matrix 0
3, 72, 8168, 3510112, 5018010431 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A213990

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A332721 A332747 A202948 * A156908 A182517 A135866

Adjacent sequences:  A213983 A213984 A213985 * A213987 A213988 A213989

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 29 08:26 EST 2020. Contains 332355 sequences. (Running on oeis4.)