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Some of the larger entries may only correspond to probable primes.
Table of n, a(n) for n=1..16.
Cf. A000142, A034386, A078744.
Sequence in context: A133893 A101647 A155150 * A087663 A112813 A048018
Adjacent sequences: A078742 A078743 A078744 * A078746 A078747 A078748
Jason Earls (zevi_35711(AT)yahoo.com), Dec 21 2002
One more term from Ryan Propper, Feb 12 2007