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A024634

n written in fractional base 5/4.

0, 1, 2, 3, 4, 40, 41, 42, 43, 44, 430, 431, 432, 433, 434, 4320, 4321, 4322, 4323, 4324, 43210, 43211, 43212, 43213, 43214, 432100, 432101, 432102, 432103, 432104, 432140, 432141, 432142, 432143, 432144, 4321030, 4321031, 4321032, 4321033, 4321034

(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/5]] + Mod[n, 5]]; Array[a, 50, 0] (* Amiram Eldar, Jul 31 2025 *)

PROG

(PARI) a(n) = if(n == 0, 0, 10 * a(n\5 * 4) + n % 5); \\ Amiram Eldar, Jul 31 2025

CROSSREFS

Cf. A245335, A245357.

Sequence in context: A278939 A302943 A037326 * A134305 A000033 A270350

Adjacent sequences: A024631 A024632 A024633 * A024635 A024636 A024637

KEYWORD

nonn,base,easy

AUTHOR

David W. Wilson

STATUS

approved

URL: https://oeis.org/A024634

⇱ A024634 - OEIS