A390764 Number of digits in base-6 representation of n.

1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3

Offset

0,7

Links

Paolo Xausa, Table of n, a(n) for n = 0..10000

Formula

a(n) = floor(log_6(n)) + 1, for n >= 1.

Example

a(1000) = 4 because 1000 = 4344_6 (4 digits).

Mathematica

A390764[n_] := If[n == 0, 1, IntegerLength[n, 6]];
Array[A390764, 100, 0]

Crossrefs

Cf. analogous sequences for other bases: A070939 (base 2), A081604 (base 3), A110591 (base 4), A110592 (base 5), A390765 (base 7), A390766 (base 8), A390767 (base 9), A055642 (base 10).

Cf. A007092.

Sequence in context: A242253 A071839 A235044 * A163857 A185715 A111893

Adjacent sequences: A390761 A390762 A390763 * A390765 A390766 A390767

Keyword

nonn,base,easy

Author

Paolo Xausa, Nov 18 2025

Status

approved