login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A135175 5^p + 3^p - 2^p, where p = prime(n). 1
30, 144, 3336, 80184, 49003224, 1222289256, 763068462216, 19074648065304, 11921023089868344, 186264583552936197096, 4656613490748641378424, 72759576592118027485247016, 45474735125119406073899483976, 1136868377544417255992242883544, 710542735786689000089344282510584 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..200

FORMULA

p=A000040(n): a(n)= 5^p + 3^p - 2^p.

EXAMPLE

a(4)=80184 because the 4th prime number is 7, 5^7=78125, 3^7=2187, 2^7=128 and 78125+2187-128=80184.

MATHEMATICA

5^#+3^#-2^#&/@Prime[Range[20]]  (* Harvey P. Dale, Apr 04 2011 *)

Table[5^p + 3^p - 2^p, {p, Prime[Range[20]]} (* Vincenzo Librandi, May 24 2014 *)

PROG

(MAGMA)[5^p+3^p-2^p: p in PrimesUpTo(100)]; // Vincenzo Librandi, Dec 14 2010

CROSSREFS

Cf. 2^p: A034785. 3^p: A057901. 2^5: A057902.

Sequence in context: A229450 A124958 A126417 * A186895 A185480 A206040

Adjacent sequences:  A135172 A135173 A135174 * A135176 A135177 A135178

KEYWORD

nonn,easy

AUTHOR

Omar E. Pol, Nov 25 2007

EXTENSIONS

More terms from Vincenzo Librandi, Dec 14 2010

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified December 18 08:30 EST 2014. Contains 252114 sequences.