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

 

Logo

Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A180456 Central term of seven successive primes whose average is a prime. 0
17, 53, 109, 157, 173, 193, 227, 229, 281, 349, 439, 607, 659, 701, 709, 827, 883, 977, 1153, 1187, 1301, 1619, 1667, 1867, 2207, 2281, 2287, 2293, 2339, 2671, 2819, 2843, 3001, 3067, 3313, 3457, 3461, 3539, 3673, 3727, 3833, 3943, 4013, 4051, 4517, 4951 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The average value is not always the same as the central term.

LINKS

Table of n, a(n) for n=1..46.

FORMULA

a(n)=[p(n-3)+p(n-2)+p(n-1)+p(n)+p(n+1)+p(n+2)+p(n+3)]/7

CROSSREFS

Sequence in context: A044500 A142105 A031383 * A154409 A033213 A082078

Adjacent sequences:  A180453 A180454 A180455 * A180457 A180458 A180459

KEYWORD

nonn

AUTHOR

Carmine Suriano, Sep 06 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 July 31 11:21 EDT 2014. Contains 245085 sequences.