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Number of distinct reducible characteristic polynomials of n X n real robust {0,1}-matrices.
2

%I #5 Dec 12 2012 00:34:41

%S 0,1,6,68,1893

%N Number of distinct reducible characteristic polynomials of n X n real robust {0,1}-matrices.

%F a(n)=A127182(n)-A127183(n)

%Y Cf. A125587, A125593, A127182, A127183, A127186.

%K nonn

%O 1,3

%A _Artur Jasinski_ and Peter Pein (petsie(AT)dordos.net), Jan 07 2007