OFFSET
1,1
COMMENTS
This is also an ascending subsequence of the even-indexed terms of A056240(2n) (of which A292081 is a subsequence). For n >= 1, a(n) is a semiprime of the form a(n)=5*A049591(n), and the index m in A056240 of any term in this sequence belongs to the sequence of even numbers m such that m-5 is prime and m-3 is not prime (A297925). See A297925 for explanation.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1690
EXAMPLE
MATHEMATICA
5 Select[Prime[Range[3, 100]], ! PrimeQ[(# + 2)] &] (* Vincenzo Librandi, Nov 12 2018 *)
PROG
(Magma) [5*p: p in PrimesInInterval(3, 500) | not IsPrime(p + 2)]; // Vincenzo Librandi, Nov 12 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
David James Sycamore, Dec 26 2017
STATUS
approved