A058186 Numbers (written in base 5) which appear the same when written in base 5 and base 10/2.

0, 1, 2, 3, 4, 20, 21, 22, 23, 24, 40, 41, 42, 43, 44, 200, 201, 202, 203, 204, 220, 221, 222, 223, 224, 240, 241, 242, 243, 244, 400, 401, 402, 403, 404, 420, 421, 422, 423, 424, 440, 441, 442, 443, 444, 2000, 2001, 2002, 2003, 2004, 2020, 2021, 2022, 2023

Offset

0,3

Comments

To represent a number in base b, if a digit exceeds b, subtract b and carry 1. In fractional base b/c, subtract b and carry c. The sequence consists of numbers which in base 5 have digits in {0,2,4} except that the unit digit can be any from {0,1,2,3,4}.

Links

Table of n, a(n) for n=0..53.

Example

20 (10 in decimal) appears since it is written as 20 both in base 5 and base 10/2. 30 (15 in decimal) does not since it is written as 30 in base 5 and 25 in base 10/2.

Crossrefs

Cf. A007091, A024657, A058185.

Sequence in context: A012281 A098503 A092974 * A024632 A300902 A352581

Adjacent sequences: A058183 A058184 A058185 * A058187 A058188 A058189

Keyword

base,nonn

Author

Henry Bottomley, Nov 17 2000

Status

approved