OFFSET
1,1
COMMENTS
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..10000
FORMULA
EXAMPLE
a(1) = prime(3almostprime(1)) = prime(8) = 19.
a(2) = prime(3almostprime(2)) = prime(12) = 37.
a(3) = prime(3almostprime(3)) = prime(18) = 61.
MATHEMATICA
Prime[#]&/@Select[Range[400], PrimeOmega[#]==3&] (* Harvey P. Dale, Mar 19 2020 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jonathan Vos Post, Oct 23 2006
STATUS
approved