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A271588 Number of matrices with multiple eigenvalues from the set of n X n matrices with elements {-1, 0, +1}. 1

%I

%S 0,19,4629,7171257,89765448427

%N Number of matrices with multiple eigenvalues from the set of n X n matrices with elements {-1, 0, +1}.

%D 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.

%H <a href="https://github.com/steventhornton/BHIME-Project">GitHub repository for code used to generate this sequence.</a>

%Y Number of characteristic polynomials A272658.

%K nonn,more,hard

%O 1,2

%A _Steven E. Thornton_, Jul 13 2016

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Last modified December 11 12:33 EST 2019. Contains 329916 sequences. (Running on oeis4.)