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A306794 Number of distinct real eigenvalues of n X n matrices with elements {-1, 1}. 1
2, 5, 15, 119, 2297, 145213 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
S. E. Thornton, Properties of the Bohemian family of n x n matrices with population {-1, 1}, Characteristic Polynomial Database.
CROSSREFS
Number of distinct eigenvalues is in A306791.
Number of characteristic polynomials is in A272662.
Number of minimal polynomials is in A306782.
Sequence in context: A196196 A266573 A268121 * A111790 A309115 A248125
KEYWORD
nonn,more,hard
AUTHOR
Steven E. Thornton, Mar 10 2019
STATUS
approved

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Last modified March 28 07:18 EDT 2024. Contains 371235 sequences. (Running on oeis4.)