OFFSET
1,1
COMMENTS
Except for the first 4 terms, a subsequence of A088281. - Chai Wah Wu, Dec 17 2015
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..15
MATHEMATICA
t = Prime[Range[4]]; Union[Select[Flatten[Table[NestList[FromDigits[Flatten[{1, IntegerDigits[#], 1}]] &, n, 45], {n, t}]], PrimeQ]] (* Jayanta Basu, Jun 27 2013 *)
PROG
(Python)
from __future__ import division
from sympy import isprime
A046705_list = [n for n in ((10**(2*l+1)-1)//9+d*10**l for l in range(100) for d in [1, 2, 4, 6]) if isprime(n)] # Chai Wah Wu, Dec 17 2015
CROSSREFS
KEYWORD
base,nonn
AUTHOR
STATUS
approved