OFFSET
1,1
COMMENTS
Analogous to A005385; can be called 6-safe primes.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = 6*A007693(n) + 1.
EXAMPLE
103 is in the sequence because both 17 and 6*17 + 1 = 103 are primes.
MATHEMATICA
Select[1 + 6Prime@Range[120], PrimeQ] (* Ray Chandler, Mar 14 2007 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Edited, corrected and extended by Ray Chandler, Mar 14 2007
STATUS
approved