A306002 Number of distinct real eigenvalues of n X n matrices with elements {-1, 0, +1}.

3, 11, 157, 8825, 2681903

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