OFFSET
1,3
MATHEMATICA
Join[Range[0, 9], Select[Range[10, 98], GCD@@IntegerDigits[#]==1 &]] (* Stefano Spezia, Dec 23 2022 *)
PROG
(Python)
from math import gcd
from functools import reduce
def ok(n):
d = list(map(int, str(n)))
return len(d) == 1 or reduce(gcd, d) == 1
print([k for k in range(100) if ok(k)]) # Michael S. Branicky, Dec 23 2022
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy, Nov 28 2002
STATUS
approved