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!)
A306782 Number of distinct minimal polynomials of n X n matrices with elements {-1, 1}. 3
2, 6, 30, 223, 3408 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

S. E. Thornton, Properties of the Bohemian family of n x n matrices with population {-1, 1}, Characteristic Polynomial Database.

CROSSREFS

Number of characteristic polynomials is in A272662.

Sequence in context: A112317 A089459 A027882 * A106209 A003266 A303169

Adjacent sequences:  A306779 A306780 A306781 * A306783 A306784 A306785

KEYWORD

nonn,more,hard

AUTHOR

Steven E. Thornton, Mar 09 2019

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 28 13:24 EDT 2020. Contains 337393 sequences. (Running on oeis4.)