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A139290 2^(2p - 1)/4, where p is prime. 9
2, 8, 128, 2048, 524288, 8388608, 2147483648, 34359738368, 8796093022208, 36028797018963968, 576460752303423488, 2361183241434822606848, 604462909807314587353088, 9671406556917033397649408 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..14.

FORMULA

a(n) = A139286(n)/4.

MATHEMATICA

2^(2#-1)/4 & /@ Prime@ Range@ 15 (* Harvey P. Dale, Dec 16 2010 *)

PROG

(MAGMA) [2^(2*p-1)div 4: p in PrimesUpTo(200)] // Vincenzo Librandi, Dec 15 2010

CROSSREFS

Cf. A139286, A139287, A139288, A139289, A139290, A139292, A139293, A139294, A139306.

Sequence in context: A064205 A081856 A038533 * A152922 A114977 A011822

Adjacent sequences:  A139287 A139288 A139289 * A139291 A139292 A139293

KEYWORD

nonn

AUTHOR

Omar E. Pol, Apr 13 2008

EXTENSIONS

More terms from Jon E. Schoenfield, Jul 16 2010

STATUS

approved

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Last modified April 19 04:19 EDT 2019. Contains 322237 sequences. (Running on oeis4.)