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A138407
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a(n) = p^4*(p-1), where p = prime(n).
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5
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16, 162, 2500, 14406, 146410, 342732, 1336336, 2345778, 6156502, 19803868, 27705630, 67469796, 113030440, 143589642, 224465326, 410305012, 702806938, 830750460, 1329973986, 1778817670, 2044673352, 3038106318, 3891582322
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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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Product_{n>=1} (1 - 1/a(n)) = A065416. (End)
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MATHEMATICA
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a = {}; Do[p = Prime[n]; AppendTo[a, p^5 - p^4], {n, 1, 50}]; a
f54[n_]:=Module[{c=Prime[n]}, c^5-c^4]; Array[f54, 30] (* Harvey P. Dale, Mar 29 2015 *)
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PROG
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(Magma) [NthPrime((n))^5 - NthPrime((n))^4: n in [1..30] ]; // Vincenzo Librandi, Jun 17 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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EXTENSIONS
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STATUS
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approved
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