A171014 In the sequence of prime numbers, replace all the '2' digits with '0' and vice versa.

0, 3, 5, 7, 11, 13, 17, 19, 3, 9, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 121, 123, 127, 129, 113, 107, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 11, 3, 7, 9, 33, 39, 41, 51, 57, 63, 69, 71, 77, 81, 83, 93

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[#]/.{2->p,0->q}/.{p->0,q->2}]&/@ Prime[ Range[70]] (* Harvey P. Dale, Dec 11 2011 *)

PARI

a(n)=my(v=[2,1,0,3,4,5,6,7,8,9]);apply(k->v[k+1],digits(prime(n))) \\ Charles R Greathouse IV, Jul 16 2013