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A138425
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a(n) = (prime(n)^5 - prime(n))/3.
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3
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10, 80, 1040, 5600, 53680, 123760, 473280, 825360, 2145440, 6837040, 9543040, 23114640, 38618720, 49002800, 76448320, 139398480, 238308080, 281532080, 450041680, 601409760, 691023840, 1025685440, 1313013520, 1861353120
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OFFSET
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1,1
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LINKS
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FORMULA
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MATHEMATICA
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a = {}; Do[p = Prime[n]; AppendTo[a, (p^5 - p)/3], {n, 1, 50}]; a
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PROG
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(Magma) [(NthPrime((n))^5 - NthPrime((n)))/3: n in [1..30] ]; // Vincenzo Librandi, Jun 18 2011
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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