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A138430 a(n) = (prime(n)^5 - prime(n))/30. 4
1, 8, 104, 560, 5368, 12376, 47328, 82536, 214544, 683704, 954304, 2311464, 3861872, 4900280, 7644832, 13939848, 23830808, 28153208, 45004168, 60140976, 69102384, 102568544, 131301352, 186135312, 286244672, 350336680, 386424688, 467517240, 512874648 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
a(n) = Sum_{i+j=p} (i^2)*(j^2) where p = prime(n). - Michel Lagneau, May 21 2012
LINKS
FORMULA
a(n) = A138404(n)/30. - R. J. Mathar, Oct 15 2017
a(n) = A138426(n)/6. - Bernard Schott, Feb 28 2023
MATHEMATICA
Table[p = Prime[n]; (p^5 - p)/30, {n, 50}]
PROG
(Magma) [(NthPrime((n))^5 - NthPrime((n)))/30: n in [1..30]]; // Vincenzo Librandi, Jun 18 2011
(PARI) forprime(p=2, 1e3, print1((p^5-p)/30", ")) \\ Charles R Greathouse IV, Jul 15 2011
CROSSREFS
Sequence in context: A090237 A222664 A190786 * A366653 A164760 A335608
KEYWORD
nonn,easy
AUTHOR
Artur Jasinski, Mar 19 2008
STATUS
approved

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Last modified March 29 08:01 EDT 2024. Contains 371265 sequences. (Running on oeis4.)