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A306002 Number of distinct real eigenvalues of n X n matrices with elements {-1, 0, +1}. 0
3, 11, 157, 8825, 2681903 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

Steven E. Thornton & Robert M. Corless, The Bohemian Eigenvalue Project, Poster Presented at The International Symposium on Symbolic and Algebraic Computation (ISSAC 2016). Wilfrid Laurier University, July 19-22, 2016.

LINKS

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

Steven E. Thornton & Robert M. Corless, The Bohemian Eigenvalue Project.

CROSSREFS

Number of distinct eigenvalues: A271570.

Number of characteristic polynomials: A272658.

Sequence in context: A010682 A080987 A132561 * A140538 A006485 A003115

Adjacent sequences:  A305999 A306000 A306001 * A306003 A306004 A306005

KEYWORD

nonn,hard,more

AUTHOR

Steven E. Thornton, Jun 16 2018

STATUS

approved

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Last modified December 1 16:07 EST 2021. Contains 349430 sequences. (Running on oeis4.)