Voozh

A024637

n written in fractional base 6/4.

0, 1, 2, 3, 4, 5, 40, 41, 42, 43, 44, 45, 420, 421, 422, 423, 424, 425, 4200, 4201, 4202, 4203, 4204, 4205, 4240, 4241, 4242, 4243, 4244, 4245, 42020, 42021, 42022, 42023, 42024, 42025, 42400, 42401, 42402, 42403, 42404, 42405, 42440, 42441, 42442, 42443

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

COMMENTS

To represent a number in base b, if a digit exceeds b-1, subtract b and carry 1. In fractional base a/b, subtract a and carry b.

LINKS

Amiram Eldar, Table of n, a(n) for n = 0..10000

Index entries for sequences related to fractional bases.

MATHEMATICA

a[n_] := a[n] = If[n == 0, 0, 10 * a[4 * Floor[n/6]] + Mod[n, 6]]; Array[a, 100, 0] (* Amiram Eldar, Aug 04 2025 *)

PROG

(PARI) a(n) = if(n == 0, 0, 10 * a(n\6 * 4) + n % 6); \\ Amiram Eldar, Aug 04 2025