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A121619
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Indices n such that Nexus numbers of order 7 (A022523[n-1] = n^7 - (n-1)^7) are primes.
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5
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2, 4, 7, 8, 9, 10, 12, 17, 26, 33, 36, 39, 41, 49, 51, 55, 59, 66, 78, 79, 80, 88, 96, 98, 104, 113, 118, 120, 123, 135, 136, 142, 146, 156, 157, 160, 162, 173, 176, 194, 210, 219, 220, 221, 222, 224, 232, 234, 247, 281, 291, 297, 298, 305
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Corresponding Nexus Primes of order 7 (or primes of form A022523[n-1] = n^7 - (n-1)^7) are listed in A121618[n] = {127,14197,543607,1273609,2685817,5217031,16344637,141903217,...}.
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MATHEMATICA
| Do[np7=n^7 - (n-1)^7; If[PrimeQ[np7], Print[n]], {n, 1, 100}]
Do[np7=n^7 - (n-1)^7; If[PrimeQ[np7], Print[n]], {n, 1, 305}] - Carl R. White (oeisfan(AT)phodd.net), Feb 28 2008
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CROSSREFS
| Cf. A022523, A121619, A121618, A121616, A121620.
Sequence in context: A103254 A083454 A047542 * A167500 A010377 A194465
Adjacent sequences: A121616 A121617 A121618 * A121620 A121621 A121622
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KEYWORD
| nonn
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AUTHOR
| Alexander Adamchuk (alex(AT)kolmogorov.com), Aug 10 2006
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EXTENSIONS
| More terms from Carl R. White (oeisfan(AT)phodd.net), Feb 28 2008
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