login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A171037 In the sequence of prime numbers, replace all the '7' digits with '3' and vice versa. 3
2, 7, 5, 3, 11, 17, 13, 19, 27, 29, 71, 73, 41, 47, 43, 57, 59, 61, 63, 31, 37, 39, 87, 89, 93, 101, 107, 103, 109, 117, 123, 171, 173, 179, 149, 151, 153, 167, 163, 137, 139, 181, 191, 197, 193, 199, 211, 227, 223, 229, 277, 279, 241, 251, 253, 267 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

pq[n_]:=Module[{idn=IntegerDigits[n]}, FromDigits[idn/.{7->p, 3->q}/.{p->3, q->7}]]; pq/@Prime[Range[60]] (* Harvey P. Dale, Dec 11 2012 *)

PROG

(PARI) a(n)=my(v=[0, 1, 2, 7, 4, 5, 6, 3, 8, 9]); subst(Pol(apply(k->v[k+1], digits(prime(n)))), 'x, 10) \\ Charles R Greathouse IV, Jul 25 2013

CROSSREFS

Sequence in context: A011232 A272699 A138344 * A246205 A160669 A301816

Adjacent sequences:  A171034 A171035 A171036 * A171038 A171039 A171040

KEYWORD

nonn,base,easy

AUTHOR

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

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 13 16:10 EDT 2019. Contains 327966 sequences. (Running on oeis4.)