A138427 a(n) = (prime(n)^5 - prime(n))/6.

5, 40, 520, 2800, 26840, 61880, 236640, 412680, 1072720, 3418520, 4771520, 11557320, 19309360, 24501400, 38224160, 69699240, 119154040, 140766040, 225020840, 300704880, 345511920, 512842720, 656506760, 930676560, 1431223360

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..200

Formula

a(n) = A138404(n)/6. - R. J. Mathar, Oct 15 2017

Mathematica

a = {}; Do[p = Prime[n]; AppendTo[a, (p^5 - p)/6], {n, 1, 50}]; a
(#^5-#)/6&/@Prime[Range[40]] (* Harvey P. Dale, Dec 17 2013 *)

Prog

(Magma) [(NthPrime((n))^5 - NthPrime((n)))/6: n in [1..30]]; // Vincenzo Librandi, Jun 18 2011
(PARI) forprime(p=2, 1e3, print1((p^5-p)/6", ")) \\ Charles R Greathouse IV, Jul 15 2011

Crossrefs

Sequence in context: A145166 A113079 A211046 * A277405 A280572 A217904

Adjacent sequences: A138424 A138425 A138426 * A138428 A138429 A138430

Keyword

nonn,easy

Author

Artur Jasinski, Mar 19 2008

Status

approved