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A085816 Semiprimes such that the sum of the factorials of the digits is also semiprime. 0

%I

%S 14,15,22,25,51,82,115,118,121,123,141,145,146,158,166,177,185,201,

%T 203,205,206,213,215,218,254,259,265,295,302,321,323,407,411,415,417,

%U 451,471,481,482,501,502,511,514,517,526,529,542,562,581,614,671,706,707

%N Semiprimes such that the sum of the factorials of the digits is also semiprime.

%t Select[Select[Range[1000],PrimeOmega[#]==2&],PrimeOmega[Total[ IntegerDigits[ #]!]] == 2&] (* _Harvey P. Dale_, Jul 13 2011 *)

%K base,easy,nonn

%O 1,1

%A _Jason Earls_, Jul 25 2003

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Last modified March 27 02:29 EDT 2023. Contains 361553 sequences. (Running on oeis4.)