%N Numbers n such that concatenations of divisors of n are nonprime.
%C See A037278(n) = concatenation of divisors of n. See A176556 for corresponding values of concatenations. Complement of A176553(n) for n >= 2.
%e a(6) = 8: divisors of 8 are 1,2,4,8 and their concatenation 1248 is nonprime.
%A _Jaroslav Krizek_, Apr 20 2010
%E Edited and extended by _Charles R Greathouse IV_, Apr 30 2010