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A minimal number is the smallest number with a given number of divisors, see A007416;
a(n) = A007949(A007416(n)).
Table of n, a(n) for n=1..84.
Cf. A099313, A099312, A099316.
Sequence in context: A068914 A090824 A259538 * A214341 A131334 A004602
Adjacent sequences: A099311 A099312 A099313 * A099315 A099316 A099317
Reinhard Zumkeller, Oct 12 2004