login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A138424 a(n) = (prime(n)^5 - prime(n))/2. 3
15, 120, 1560, 8400, 80520, 185640, 709920, 1238040, 3218160, 10255560, 14314560, 34671960, 57928080, 73504200, 114672480, 209097720, 357462120, 422298120, 675062520, 902114640, 1036535760, 1538528160, 1969520280, 2792029680 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = A138404(n)/2. - R. J. Mathar, Oct 15 2017
MATHEMATICA
a = {}; Do[p = Prime[n]; AppendTo[a, (p^5 - p)/2], {n, 1, 50}]; a
(#^5-#)/2&/@Prime[Range[30]] (* Harvey P. Dale, Oct 01 2017 *)
PROG
(Magma) [(NthPrime((n))^5 - NthPrime((n)))/2: n in [1..30] ]; // Vincenzo Librandi, Jun 18 2011
(PARI) forprime(p=2, 1e3, print1((p^5-p)/2", ")) \\ Charles R Greathouse IV, Jul 15 2011
CROSSREFS
Sequence in context: A022580 A321950 A081079 * A279267 A357602 A120794
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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 21 14:42 EST 2024. Contains 370236 sequences. (Running on oeis4.)