HP 49G Programming Challenge: OEIS A014261, Integers with exclusively Odd Digits

[Gerald H]

But maybe I'm unfair to Didier, for if this is his programme

Code:


NINTODD

« → N
  « N 5. ≤
    IF
    THEN 0.
    ELSE N 1. - 5.
/ IP NINTODD
    END 10. * 1. +
N 1. - 5. MOD 2. *
+
  »
»

the 49G takes 0.33s for input 50.