1,1
a(n)=3^A000040(n)
a(4)=3^7=2187
3^Prime@Range@30 (* From Vladimir Joseph Stephan Orlovsky, Apr 11 2011 *)
Cf. A034785, A053810, A057902.
Sequence in context: A053762 A126322 A020279 * A020254 A124396 A020281
Adjacent sequences: A057898 A057899 A057900 * A057902 A057903 A057904
nonn
Henry Bottomley (se16(AT)btinternet.com), Sep 29 2000