OFFSET
1,3
MATHEMATICA
Select[Range[0, 120], DigitCount[#, 12, 3]==DigitCount[#, 12, 7]&] (* Harvey P. Dale, May 04 2011 *)
PROG
(PARI) isok(n) = my(d=digits(n, 12)); #select(x->(x==3), d) == #select(x->(x==7), d); \\ Michel Marcus, Feb 05 2019
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved