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A306820
Number of nilpotent n X n matrices with elements {-1, 0, 1}.
0
1, 9, 481, 148817, 243782721
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..5.
S. E. Thornton,
Properties of the Bohemian family of n x n matrices with population {-1, 0, 1}
, Characteristic Polynomial Database.
CROSSREFS
Number of characteristic polynomials is in
A272658
.
Number of distinct eigenvalues is in
A271570
.
Sequence in context:
A293951
A267236
A357768
*
A157595
A042415
A277360
Adjacent sequences:
A306817
A306818
A306819
*
A306821
A306822
A306823
KEYWORD
nonn
,
more
,
hard
AUTHOR
Steven E. Thornton
, Mar 11 2019
STATUS
approved
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Last modified June 23 22:09 EDT 2024. Contains 373661 sequences. (Running on oeis4.)