A061244 Prime numbers with odd digits in ascending order.

3, 5, 7, 11, 13, 17, 19, 37, 59, 79, 113, 137, 139, 157, 179, 199, 337, 359, 379, 557, 577, 599, 1117, 1399, 1559, 1579, 1777, 1999, 3359, 3557, 3559, 3779, 5557, 5779, 11113, 11117, 11119, 11159, 11177, 11399, 11579, 11777, 11779, 13337, 13339

Offset

1,1

Links

Robert Israel, Table of n, a(n) for n = 1..10000

Example

37 is a term since 3 and 7 are odd digits and 3 < 7.

Maple

A061244:= {}:
for d from 1 to 20 do
  for n1 from 0 to d do
    x1:= (10^n1-1)/9;
    for n3 from 0 to d-n1 do
      x3:= x1*10^n3 + (10^n3-1)/9*3;
      for n5 from 0 to d-n1-n3 do
        x5:= x3*10^n5 + (10^n5-1)/9*5;
        for n7 from 0 to d-n1-n3-n5 do
          x7:= x5*10^n7 + (10^n7-1)/9*7;
          n9:= d-n1-n3-n5-n7;
          x:= x7*10^n9 + (10^n9-1);
          if isprime(x) then
            A061244:= A061244 union {x};
          fi
od od od od od:
A061244;
# Robert Israel, Apr 20 2014

Crossrefs

Cf. A061245, A028864, A052015.

Sequence in context: A045394 A264030 A070739 * A353137 A060290 A096880

Adjacent sequences: A061241 A061242 A061243 * A061245 A061246 A061247

Keyword

nonn,base

Author

Amarnath Murthy, Apr 23 2001

Extensions

More terms from Patrick De Geest, Jun 04 2001

Status

approved