OFFSET
1,1
COMMENTS
Subsequence of A006450.
Using the Prime Number Theorem, prime(n) ~ n log n, the asymptotic behavior is A217622(n) ~ 2n (log 2n) log(2n log 2n) ~ 2n (log n)^2 ~ A230460(n). - M. F. Hasler, Oct 19 2013
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
FORMULA
a(n) = A006450(2n). - M. F. Hasler, Oct 20 2013
MATHEMATICA
Table[Prime[Prime[2n]], {n, 100}]
PROG
(Magma) [NthPrime(NthPrime(2*n)): n in [1..50] ]; //
(PARI) a(n)=prime(prime(2*n)) \\ Charles R Greathouse IV, Oct 20 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Oct 13 2012
STATUS
approved