OFFSET
1,1
FORMULA
a(n)=[p(n)+p(n+1)+p(n+2)+p(n+3)]/4 a(n) being a prime
EXAMPLE
a(5)=233 since (233+239+241+251)/4=964/4=241 is a prime.
CROSSREFS
KEYWORD
nonn
AUTHOR
Carmine Suriano, Sep 05 2010
STATUS
approved