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Search: id:A006686
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| A006686 |
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Octavan primes: primes of the form p = x^8 + y^8.
(Formerly M5428)
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+0
4
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| 2, 257, 65537, 2070241, 100006561, 435746497, 815730977, 832507937, 1475795617, 2579667841, 4338014017, 5110698017, 6975822977, 16983628577, 17995718017, 25605764801, 32575757441, 37822859617, 37839636577, 54875880097
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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A. J. C. Cunningham, Binomial Factorisations, Vols. 1-9, Hodgson, London, 1923-1929; see Vol. 1, pp. 245-259.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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T. D. Noe, Table of n, a(n) for n = 1..1000
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EXAMPLE
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65537=1^8+4^8
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MATHEMATICA
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lst={}; Do[If[PrimeQ[a^8+b^8], AppendTo[lst, a^8+b^8]], {a, 100}, {b, a, 100}]; Sort[lst] (T. D. Noe)
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CROSSREFS
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Cf. A003380.
Sequence in context: A003380 A060890 A085316 this_sequence A100269 A128697 A089663
Adjacent sequences: A006683 A006684 A006685 this_sequence A006687 A006688 A006689
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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Corrected and extended by Jud McCranie (j.mccranie(AT)comcast.net), Jan 04 2001
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