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A121618
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Nexus primes of order 7 or primes of form n^7 - (n-1)^7 = A022523[n-1].
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7
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127, 14197, 543607, 1273609, 2685817, 5217031, 16344637, 141903217, 1928294551, 8258704609, 14024867221, 22815424087, 30914273881, 91154730577, 116160677851, 183510024391, 280667317267, 552932810431, 1517045588059
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Indices n such that Nexus number of 7 order (or A022523[n-1] = n^7 - (n-1)^7)is prime are listed in A121619[n] = {2,4,7,8,9,10,12,17,26,33,36,39,41,49,51,55,59,66,78,79,80,88,96,98,...}. a(1) = 127 is Mersenne prime A000668[4].
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MAPLE
| Select[Table[n^7 - (n-1)^7, {n, 1, 200}], PrimeQ]
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CROSSREFS
| Cf. A022523, A000040, A000043, A000668, A002407, A121616, A121618, A121619, A121620.
Sequence in context: A140477 A110828 A022189 * A069382 A058322 A138128
Adjacent sequences: A121615 A121616 A121617 * A121619 A121620 A121621
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KEYWORD
| nonn
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AUTHOR
| Alexander Adamchuk (alex(AT)kolmogorov.com), Aug 10 2006
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