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Search: id:A127047
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| A127047 |
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Primes p such that denominator of Sum_{k=1..p-1} 1/k^4} is a fourth power. |
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+0
9
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| 2, 3, 5, 7, 11, 13, 17, 19, 29, 31, 53, 67, 71, 73, 97, 101, 103, 107, 109, 127, 131, 197, 199, 211, 223, 227, 229, 233, 293, 367, 373, 379, 383, 389, 397, 401, 439, 443, 449, 457, 461, 463, 557, 563, 569, 571, 577, 877, 881, 883, 967, 971, 977, 983, 991, 997
(list; graph; listen)
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OFFSET
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1,1
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MAPLE
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d[n_] := Module[{}, su = 0; a = {}; For[i = 1, i <= n, i++, su = su + 1/ i^4; If[PrimeQ[i + 1], If[IntegerQ[(Denominator[su])^(1/4)], AppendTo[a, i + 1]]]]; a] d[10000]
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CROSSREFS
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Cf. A061002, A034602, A127029, A127042, A127046.
Sequence in context: A133956 A141409 A004051 this_sequence A119615 A061771 A124589
Adjacent sequences: A127044 A127045 A127046 this_sequence A127048 A127049 A127050
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Jan 03 2007
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