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A306820
Number of nilpotent n X n matrices with elements {-1, 0, 1}.
0
1, 9, 481, 148817, 243782721
OFFSET
1,2
CROSSREFS
Number of characteristic polynomials is in A272658.
Number of distinct eigenvalues is in A271570.
Sequence in context: A293951 A267236 A357768 * A157595 A042415 A277360
KEYWORD
nonn,more,hard
AUTHOR
Steven E. Thornton, Mar 11 2019
STATUS
approved