Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #14 Mar 09 2019 20:23:51
%S 2,6,30,223,3408
%N Number of distinct minimal polynomials of n X n matrices with elements {-1, 1}.
%H S. E. Thornton, <a href="http://www.bohemianmatrices.com/cpdb/unstructured/unstructured_n1_1">Properties of the Bohemian family of n x n matrices with population {-1, 1}</a>, Characteristic Polynomial Database.
%Y Number of characteristic polynomials is in A272662.
%K nonn,more,hard
%O 1,1
%A _Steven E. Thornton_, Mar 09 2019