OFFSET
1,1
COMMENTS
Prime terms 2,3,5,11,23,29,... are in A005384.
A156541 is a subsequence. [Reinhard Zumkeller, Feb 10 2009]
MATHEMATICA
Select[Range[2, 132], PrimeQ[FactorInteger[#][[-1, 1]]*2 + 1] &] (* Ivan Neretin, Aug 30 2015 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Zak Seidov, May 14 2007
STATUS
approved