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1,2,3 together with the semiprimes A001358.
0

%I #2 Mar 30 2012 18:52:39

%S 1,2,3,4,6,9,10,14,15,21,22,25,26,33,34,35,38,39,46,49,51,55,57,58,62,

%T 65,69,74,77,82,85,86,87,91,93,94,95,106,111,115,118,119,121,122,123,

%U 129,133,134,141,142,143,145,146,155,158,159,161,166,169,177,178,183

%N 1,2,3 together with the semiprimes A001358.

%Y Cf. A171581, A176540.

%K nonn

%O 1,2

%A _Juri-Stepan Gerasimov_, Jun 05 2010