OFFSET
1,3
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..2500
EXAMPLE
a(1) = (p(1)-2*1)/5 = (2-2)/5 = 0.
a(2) = (p(9)-2*9)/5 = (23-18)/5 = 1.
MATHEMATICA
Select[Table[(Prime[n]-2n)/5, {n, 1000}], IntegerQ[#]&&!PrimeQ[#]&]//Union (* Harvey P. Dale, Jun 04 2023 *)
CROSSREFS
KEYWORD
nonn,easy,less
AUTHOR
Juri-Stepan Gerasimov, Oct 07 2008
EXTENSIONS
Corrected and extended by Charles R Greathouse IV, Mar 26 2010
STATUS
approved