OFFSET
1,1
EXAMPLE
{2^15,3^15,5^15}={32768,14348907,30517578125} with even digit sum {26,36,44}.
MATHEMATICA
Select[Range[500], AllTrue[Total/@(IntegerDigits/@{2^#, 3^#, 5^#}), EvenQ]&] (* Harvey P. Dale, Mar 23 2023 *)
PROG
(PARI) isok(n) = !(sumdigits(2^n) % 2) && !(sumdigits(3^n) % 2) && !(sumdigits(5^n) % 2); \\ Michel Marcus, Oct 10 2013
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Zak Seidov, May 24 2006
STATUS
approved