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A306791
Number of distinct eigenvalues of n X n matrices with elements {-1, 1}.
3
2, 9, 35, 335, 7709, 510743
OFFSET
1,1
CROSSREFS
Number of characteristic polynomials is in A272662.
Number of minimal polynomials is in A306782.
Sequence in context: A185034 A185234 A357202 * A175231 A175261 A086556
KEYWORD
nonn,more,hard
AUTHOR
Steven E. Thornton, Mar 10 2019
STATUS
approved