login
A043409
Numbers whose base-7 representation contains exactly one 4.
0
4, 11, 18, 25, 28, 29, 30, 31, 33, 34, 39, 46, 53, 60, 67, 74, 77, 78, 79, 80, 82, 83, 88, 95, 102, 109, 116, 123, 126, 127, 128, 129, 131, 132, 137, 144, 151, 158, 165, 172, 175, 176, 177, 178, 180, 181, 186, 193, 196, 197, 198, 199
OFFSET
1,1
MATHEMATICA
Select[Range[200], DigitCount[#, 7, 4]==1&] (* Harvey P. Dale, Jan 17 2011 *)
CROSSREFS
Cf. A007093.
Sequence in context: A059771 A325618 A361131 * A030610 A003327 A025403
KEYWORD
nonn,base,easy
STATUS
approved