OFFSET
1,1
COMMENTS
a(36) has 1065 digits. - Michael S. Branicky, Jan 28 2023
LINKS
Michael S. Branicky, Table of n, a(n) for n = 1..35
PROG
(Python)
from sympy import isprime
from itertools import count, islice
def agen(): yield from (t for i in count(1) for m in "124578" if isprime(t:=int("3" + m*i + "3")))
print(list(islice(agen(), 20))) # Michael S. Branicky, Jan 28 2023
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Mar 02 2002
EXTENSIONS
More terms from Sascha Kurz, Mar 17 2002
STATUS
approved