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!)
A306793 Number of distinct real eigenvalues of n X n matrices with elements {0, 1}. 0
2, 6, 28, 370, 13403, 1535679 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

S. E. Thornton, Properties of the Bohemian family of n x n matrices with population {0, 1}, Characteristic Polynomial Database.

CROSSREFS

Number of distinct eigenvalues is in A306784.

Number of characteristic polynomials is in A272661.

Number of minimal polynomials is in A306781.

Sequence in context: A277480 A108800 A325507 * A326359 A136639 A284594

Adjacent sequences:  A306790 A306791 A306792 * A306794 A306795 A306796

KEYWORD

nonn,more,hard

AUTHOR

Steven E. Thornton, Mar 10 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 January 26 20:11 EST 2020. Contains 331288 sequences. (Running on oeis4.)