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%I #6 Dec 13 2015 01:02:16
%S 4,6,9,10,21,22,33,51,55,62,65,74,77,82,85,86,87,91,93,94,95,111,221,
%T 321,411,422,511,533,542,543,551,553,554,611,622,633,655,662,721,731,
%U 753,755,763,766,771,831,841,842,843,851,862,865,866,871,886,921,922
%N Semiprimes with property that digits are in nonincreasing order.
%e The semiprime 14 is missing because 4 > 1.
%t Select[Range[1000], Plus@@Last/@FactorInteger[ # ]\[Equal]2&&OrderedQ[Reverse[IntegerDigits[ # ]]]&]
%Y Cf. A108634.
%K nonn,base,easy,less
%O 1,1
%A _Zak Seidov_, Jun 14 2005