A171047 In the sequence of prime numbers, replace all the '8' digits with '6' and vice versa.

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 81, 87, 71, 73, 79, 63, 69, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 183, 187, 173, 179, 161, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 283

Offset: 1

Author

N. J. A. Sloane and Vincenzo Librandi, Sep 04 2010

Keywords

• nonn
• base
• easy

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Programs

Mathematica

FromDigits[IntegerDigits[#]/.{8->p,6->q}/.{p->6,q->8}]&/@ Prime[ Range[ 70]] (* Harvey P. Dale, Jul 20 2011 *)

PARI

a(n)=my(v=[0,1,2,3,4,5,8,7,6,9]);subst(Pol(apply(k->v[k+1], digits(prime(n)))),'x,10) \\ Charles R Greathouse IV, Jul 31 2013