cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A079652 Prime numbers using only the curved digits 0, 3, 6, 8 and 9.

Original entry on oeis.org

3, 83, 89, 383, 389, 683, 809, 839, 863, 883, 983, 3083, 3089, 3389, 3803, 3833, 3863, 3889, 3989, 6089, 6389, 6689, 6803, 6833, 6863, 6869, 6883, 6899, 6983, 8009, 8039, 8069, 8089, 8093, 8363, 8369, 8389, 8609, 8663, 8669, 8689, 8693, 8699, 8803, 8839
Offset: 1

Views

Author

Shyam Sunder Gupta, Jan 23 2003

Keywords

Comments

Intersection of A000040 and A072960. - K. D. Bajpai, Sep 01 2014

Crossrefs

Programs

  • Maple
    N:= 4: # to get all terms with up to N digits
    Digs:= {0,3,6,8,9}:
    A:= NULL:
    for d from 1 to N do
      C:= combinat[cartprod]([Digs minus {0},Digs $(d-1)]);
      while not C[finished] do
        L:= C[nextvalue]();
        x:= add(L[i]*10^(d-i),i=1..d);
        if isprime(x) then A:= A,x fi
      od
    od:
    A; # Robert Israel, Aug 31 2014
  • Mathematica
    Select[ Range[8850], PrimeQ[ # ] && Union[ Join[ IntegerDigits[ # ], {0, 3, 6, 8, 9}]] == {0, 3, 6, 8, 9} &]
    Select[Prime[Range[5000]], Intersection[IntegerDigits[#], {1, 2, 4, 5, 7}] == {} &] (* K. D. Bajpai, Sep 01 2014 *)
    Select[FromDigits/@Tuples[{0,3,6,8,9},4],PrimeQ] (* Harvey P. Dale, Sep 05 2022 *)