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Numbers that are not squares of primes.
3

%I #8 Aug 11 2012 22:05:00

%S 1,2,3,5,6,7,8,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,26,27,28,

%T 29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,50,51,52,

%U 53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70

%N Numbers that are not squares of primes.

%C Numbers n such that A000005(n)<> 3.

%C First differs from A175084 at a(29).

%e 4 is not in the sequence because 4 as three divisors: 1, 2, 4.

%Y Complement of A001248. Column 3 of A210976.

%Y Cf. A000005, A018252, A175084, A210994.

%K nonn,easy

%O 1,2

%A _Omar E. Pol_, Aug 11 2012