login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A138443 a(n) = ((n-th prime)^6-(n-th prime^2))/4. 2
15, 180, 3900, 29400, 442860, 1206660, 6034320, 11761380, 37008840, 148705620, 221875680, 641431260, 1187525640, 1580340300, 2694803280, 5541089580, 10545132540, 12880092660, 22614594420, 32025069720, 37833555240 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..21.

FORMULA

a(n) = A138409(n)/4. - R. J. Mathar, Oct 15 2017

MATHEMATICA

a = {}; Do[p = Prime[n]; AppendTo[a, (p^6 - p^2)/4], {n, 1, 50}]; a

PROG

(PARI) forprime(p=2, 1e3, print1((p^6-p^2)/4", ")) \\ Charles R Greathouse IV, Jul 15 2011

CROSSREFS

Sequence in context: A004992 A055084 A005461 * A235455 A016158 A335509

Adjacent sequences:  A138440 A138441 A138442 * A138444 A138445 A138446

KEYWORD

nonn,easy

AUTHOR

Artur Jasinski, Mar 19 2008

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 8 20:37 EST 2021. Contains 349596 sequences. (Running on oeis4.)