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A056802
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Numbers n such that 2*9^n + 1 is prime.
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1
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0, 1, 2, 3, 8, 15, 27, 30, 66, 90, 160, 348, 391, 411, 626, 727, 2740, 3921, 6048, 6891, 8860, 21978, 32411, 41390, 52553, 82948, 95907, 264840, 537363, 543056, 587616
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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MATHEMATICA
| Do[ If[ PrimeQ[ 2*9^n + 1], Print[ n ]], {n, 0, 1000}]
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CROSSREFS
| Cf. A003306 (n such that 2*3^n + 1 is prime).
Sequence in context: A128035 A003473 A095373 * A179991 A026698 A099428
Adjacent sequences: A056799 A056800 A056801 * A056803 A056804 A056805
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KEYWORD
| nonn
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AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 22 2000
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EXTENSIONS
| More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 22 2003
More terms from David Broadhurst (D.Broadhurst(AT)open.ac.uk), Feb 22 2010
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