%I #16 Mar 13 2017 04:27:42
%S 1,2,4,8,16,27,51,83,140,225,369
%N Number of irreducible matrices X of all sizes with nonnegative integral entries satisfying X^2 = nX, counted up to a permutation of basis vectors.
%H Jakob Zimmermann, <a href="http://arxiv.org/abs/1701.03699">Counting quasi-idempotent irreducible integral matrices</a>, arXiv:1701.03699 [math.CO], 2017.
%Y Cf. A280782.
%K nonn,more
%O 1,2
%A _N. J. A. Sloane_, Jan 20 2017
%E Definition corrected by _N. J. A. Sloane_, Jan 23 2017 at the suggestion of _Jakob Zimmermann_