A138437 a(n) = ((n-th prime)^5-(n-th prime)^3)/12.

2, 18, 250, 1372, 13310, 30758, 117912, 205770, 535348, 1707230, 2383280, 5774442, 9648940, 12244078, 19103432, 34837218, 59559910, 70364110, 112485362, 150322620, 172723548, 256380280, 328205738, 465279540, 715535632, 875755850

Offset

1,1

Links

Table of n, a(n) for n=1..26.

Formula

a(n) = A138406(n)/12. - R. J. Mathar, Oct 15 2017

Mathematica

a = {}; Do[p = Prime[n]; AppendTo[a, (p^5 - p^3)/12], {n, 1, 50}]; a

Prog

(PARI) forprime(p=2, 1e3, print1((p^5-p^3)/12", ")) \\ Charles R Greathouse IV, Jul 15 2011

Crossrefs

Sequence in context: A259270 A168562 A117514 * A265452 A379253 A121429

Adjacent sequences: A138434 A138435 A138436 * A138438 A138439 A138440

Keyword

nonn,easy

Author

Artur Jasinski, Mar 19 2008

Status

approved