OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
MATHEMATICA
FromDigits[IntegerDigits[#]/.{7->p, 2->q}/.{p->2, q->7}]&/@Prime[Range[100]] (* Vincenzo Librandi, Apr 07 2013 *)
PROG
(PARI) a(n)=my(v=[0, 1, 7, 3, 4, 5, 6, 2, 8, 9]); subst(Pol(apply(k->v[k+1], digits(prime(n)))), 'x, 10) \\ Charles R Greathouse IV, Jul 25 2013
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
N. J. A. Sloane and Vincenzo Librandi, Sep 04 2010
STATUS
approved