login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A171022 In the sequence of prime numbers, replace all the '4' digits with '3' and vice versa. 3
2, 4, 5, 7, 11, 14, 17, 19, 24, 29, 41, 47, 31, 34, 37, 54, 59, 61, 67, 71, 74, 79, 84, 89, 97, 101, 104, 107, 109, 114, 127, 141, 147, 149, 139, 151, 157, 164, 167, 174, 179, 181, 191, 194, 197, 199, 211, 224, 227, 229, 244, 249, 231, 251, 257, 264 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

MATHEMATICA

FromDigits[IntegerDigits[#]/.{4->p, 3->q}/.{p->3, q->4}]&/@Prime[Range[100]] (* Vincenzo Librandi, Apr 07 2013 *)

PROG

(PARI) a(n)=my(v=[0, 1, 2, 4, 3, 5, 6, 7, 8, 9]); subst(Pol(apply(k->v[k+1], digits(prime(n)))), 'x, 10) \\ Charles R Greathouse IV, Jul 16 2013

CROSSREFS

Sequence in context: A039673 A097581 A090614 * A097697 A035620 A022439

Adjacent sequences:  A171019 A171020 A171021 * A171023 A171024 A171025

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 September 29 17:04 EDT 2020. Contains 337432 sequences. (Running on oeis4.)