A138440 a(n) = ((n-th prime)^6-(n-th prime))/2.

31, 363, 7810, 58821, 885775, 2413398, 12068776, 23522931, 74017933, 297411646, 443751825, 1282863186, 2375052100, 3160681503, 5389607641, 11082180538, 21090266791, 25760187150, 45229191051, 64050141925, 75667113108

Offset: 1

Author

Artur Jasinski, Mar 19 2008

Keywords

• nonn
• easy

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Programs

Mathematica

a = {}; Do[p = Prime[n]; AppendTo[a, (p^6 - p)/2], {n, 1, 50}]; a
(#^6-#)/2&/@Prime[Range[30]] (* Harvey P. Dale, Aug 01 2022 *)

PARI

forprime(p=2,1e3,print1((p^6-p)/2", ")) \\ Charles R Greathouse IV, Jul 15 2011

Formula

a(n) = A138408(n)/2. - R. J. Mathar, Oct 15 2017