The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A213992 Number of 3X3 0..n matrices whose square is also a 0..n matrix 1
172, 1003, 2546, 8168, 14030, 28328, 40370, 64679, 102377, 151301, 191708, 290679, 356931, 445149, 569583, 787170, 917169, 1190970, 1375176, 1744554, 2061684, 2413461, 2647641, 3323763, 3962721, 4502277, 5124586, 6087406, 6704266, 7973326 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 3 of A213990
LINKS
EXAMPLE
Some solutions for n=3
..0..0..2....1..2..1....0..3..0....0..2..1....0..1..3....1..1..0....0..1..0
..0..1..1....0..0..0....0..1..1....0..0..0....0..0..1....0..0..3....0..1..0
..0..1..1....1..0..0....0..2..0....0..0..1....0..0..0....0..0..0....0..1..1
CROSSREFS
Sequence in context: A202641 A234998 A234992 * A214115 A250968 A264213
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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 14 11:35 EDT 2024. Contains 373397 sequences. (Running on oeis4.)