A139292 2^(2p - 1)/8, where p is prime.

1, 4, 64, 1024, 262144, 4194304, 1073741824, 17179869184, 4398046511104, 18014398509481984, 288230376151711744, 1180591620717411303424, 302231454903657293676544, 4835703278458516698824704

Offset: 1

Author

Omar E. Pol, Apr 13 2008

Keywords

• nonn

Crossrefs

Cf. A139286, A139287, A139288, A139289, A139290, A139291, A139293, A139294, A139306.

Programs

Mathematica

2^(2#-1)/8&/@Prime[Range[20]] (* Harvey P. Dale, Aug 19 2012 *)

Formula

a(n) = A139286(n)/8.

Extensions

More terms from Jon E. Schoenfield, Jul 16 2010