OFFSET
1,1
COMMENTS
This sequence is prime n, where there exist two twin prime pairs of (n,n+2), (n+54,n+56).
LINKS
Karl V. Keller, Jr., Table of n, a(n) for n = 1..100000
Eric Weisstein's World of Mathematics, Prime Quadruplet.
Eric Weisstein's World of Mathematics, Twin Primes
Wikipedia, Twin prime
EXAMPLE
For n=17, the numbers 17, 19, 71, 73, are primes.
PROG
(Python)
from sympy import isprime
for n in range(1, 10000001, 2):
..if isprime(n) and isprime(n+2) and isprime(n+54) and isprime(n+56): print(n, end=', ')
CROSSREFS
KEYWORD
nonn
AUTHOR
Karl V. Keller, Jr., Jan 11 2015
STATUS
approved