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Semiprimes ordered alphabetically by where they occur in A000052.
3

%I #3 Mar 30 2012 18:40:29

%S 4,9,6,85,87,86,82,15,58,55,51,57,49,46,14,95,94,91,93,74,77

%N Semiprimes ordered alphabetically by where they occur in A000052.

%C A109986 is primes ordered alphabetically by where they occur in A000052. A109988 is 3-almost primes ordered alphabetically by where they occur in A000052.

%e a(1) = 4 because four is the first semiprime in alphabetical order.

%e a(4) = 85 because eighty-five is the first 2-digit semiprime in alphabetical order.

%Y Cf. A000052, A001358, A109986, A109988.

%K base,easy,nonn,word

%O 1,1

%A _Jonathan Vos Post_, Jul 07 2005