A139288 2^(2p - 1)/2, where p is prime.

4, 16, 256, 4096, 1048576, 16777216, 4294967296, 68719476736, 17592186044416, 72057594037927936, 1152921504606846976, 4722366482869645213696, 1208925819614629174706176, 19342813113834066795298816

Offset: 1

Author

Omar E. Pol, Apr 13 2008

Keywords

• nonn

Crossrefs

Cf. A139286, A139287, A139289, A139290, A139291, A139292, A139293, A139294, A139306.

Programs

Mathematica

Table[2^(2p-1)/2,{p,Prime[Range[20]]}] (* Harvey P. Dale, Jun 21 2021 *)

Formula

a(n)=A139286(n)/2.

Extensions

More terms from Jon E. Schoenfield, Jul 16 2010