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A139290
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2^(2p - 1)/4, where p is prime.
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9
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2, 8, 128, 2048, 524288, 8388608, 2147483648, 34359738368, 8796093022208, 36028797018963968, 576460752303423488, 2361183241434822606848, 604462909807314587353088, 9671406556917033397649408
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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FORMULA
| a(n)=A139286(n)/4.
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MATHEMATICA
| 2^(2#-1)/4 & /@ Prime@ Range@ 15 [From Harvey P. Dale, Dec. 16, 2010]
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PROG
| (MAGMA)[2^(2*p-1)div 4: p in PrimesUpTo(200)][From Vincenzo Librandi, Dec 15 2010]
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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
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KEYWORD
| nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), Apr 13 2008
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EXTENSIONS
| More terms from Jon E. Schoenfield (jonscho(AT)hiwaay.net), Jul 16 2010
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