A031452 Numbers whose base-3 representation has the same number of 0's as 2's.

1, 4, 6, 11, 13, 15, 19, 21, 32, 34, 38, 40, 42, 46, 48, 56, 58, 60, 64, 66, 72, 89, 95, 97, 101, 103, 105, 113, 115, 119, 121, 123, 127, 129, 137, 139, 141, 145, 147, 153, 167, 169, 173, 175, 177, 181, 183, 191, 193, 195, 199, 201

Offset

1,2

Links

Table of n, a(n) for n=1..52.

Mathematica

Select[Range@300, (s=#; Differences[Count[IntegerDigits[s, 3], #]&/@{0, 2}]=={0})&] (* Giorgos Kalogeropoulos, Jul 04 2021 *)

Crossrefs

Cf. A007089.

Sequence in context: A369329 A180713 A126591 * A185868 A250125 A190489

Adjacent sequences: A031449 A031450 A031451 * A031453 A031454 A031455

Keyword

nonn,base

Author

Clark Kimberling

Status

approved