A138436 a(n) = ((n-th prime)^5-(n-th prime)^3)/8.

3, 27, 375, 2058, 19965, 46137, 176868, 308655, 803022, 2560845, 3574920, 8661663, 14473410, 18366117, 28655148, 52255827, 89339865, 105546165, 168728043, 225483930, 259085322, 384570420, 492308607, 697919310, 1073303448

Offset

1,1

Links

Table of n, a(n) for n=1..25.

Formula

a(n) = A138406(n)/8. - R. J. Mathar, Oct 15 2017

Mathematica

a = {}; Do[p = Prime[n]; AppendTo[a, (p^5 - p^3)/8], {n, 1, 50}]; a

Prog

(PARI) forprime(p=2, 1e3, print1((p^5-p^3)/8", ")) \\ Charles R Greathouse IV, Jul 15 2011

Crossrefs

Sequence in context: A370288 A157089 A365794 * A141057 A365569 A365586

Adjacent sequences: A138433 A138434 A138435 * A138437 A138438 A138439

Keyword

nonn,easy

Author

Artur Jasinski, Mar 19 2008

Status

approved