OFFSET
1,1
COMMENTS
Numbers k such that A343016(k) >= 3.
All terms are divisible by 6.
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
a(3) = 48 = 2^4*3 is a term because A001414(48) = 4*2+3 = 11 and 11, 48+11 = 59 and 2*48+11 = 107 are prime.
MAPLE
filter:= proc(n) local s, t;
s:= add(t[1]*t[2], t=ifactors(n)[2]);
isprime(s) and isprime(n+s) and isprime(2*n+s)
end proc;
select(filter, [seq(i, i=6..10000, 6)]);
CROSSREFS
KEYWORD
nonn
AUTHOR
J. M. Bergot and Robert Israel, Apr 02 2021
STATUS
approved