A138443 a(n) = ((n-th prime)^6-(n-th prime^2))/4.
15, 180, 3900, 29400, 442860, 1206660, 6034320, 11761380, 37008840, 148705620, 221875680, 641431260, 1187525640, 1580340300, 2694803280, 5541089580, 10545132540, 12880092660, 22614594420, 32025069720, 37833555240
Offset: 1
Programs
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Mathematica
a = {}; Do[p = Prime[n]; AppendTo[a, (p^6 - p^2)/4], {n, 1, 50}]; a -
PARI
forprime(p=2,1e3,print1((p^6-p^2)/4", ")) \\ Charles R Greathouse IV, Jul 15 2011
Formula
a(n) = A138409(n)/4. - R. J. Mathar, Oct 15 2017