1,1

Table of n, a(n) for n=1..5.

Encyclopedia of Math, Non-derogatory matrix

S. E. Thornton, Properties of the Bohemian family of n x n matrices with population {-1, 1}, Characteristic Polynomial Database.

Number of characteristic polynomials is in A272662.

Number of minimal polynomials is in A306782.

Sequence in context: A223563 A140309 A201383 * A012461 A012458 A012171

Adjacent sequences: A306813 A306814 A306815 * A306817 A306818 A306819

nonn,more,hard

Steven E. Thornton, Mar 11 2019

approved