OFFSET
1,1
LINKS
Hartosh Singh Bal and Gaurav Bhatnagar, Prime number conjectures from the Shapiro class structure, arXiv:1903.09619 [math.NT], 2019.
MATHEMATICA
Select[2*3^Range[100]+1, PrimeQ]
CROSSREFS
KEYWORD
nonn
AUTHOR
T. D. Noe, Aug 24 2005
STATUS
approved