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Table of n, a(n) for n=1..57.
The semiprime 14 is missing because 4 > 1.
Select[Range, Plus@@Last/@FactorInteger[ # ]\[Equal]2&&OrderedQ[Reverse[IntegerDigits[ # ]]]&]
Sequence in context: A262812 A275197 A118778 * A071964 A135257 A118697
Adjacent sequences: A108632 A108633 A108634 * A108636 A108637 A108638
Zak Seidov, Jun 14 2005