A223089 Numbers n, written in base 8, with the property that if the base-8 representation of n is read backwards, the result is 5*n.

1015, 11165, 102515, 112665, 1016015, 1127665, 10151015, 10252515, 11176165, 11277665, 101501015, 102617515, 111661165, 112777665, 1015001015, 1016016015, 1025252515, 1026267515, 1116511165, 1117526165, 1126762665, 1127777665

Offset

1,1

Comments

For the decimal representations of these numbers, see A217742.

Theorem: There are 2^{floor(d/2)-2} terms with d base-8 digits.

Links

Table of n, a(n) for n=1..22.

Example

1015 reversed is 5101 = 5*1015 (calculating in base 8).

Crossrefs

Cf. A214927, A217742.

Sequence in context: A335969 A225717 A117807 * A167807 A118879 A023083

Adjacent sequences: A223086 A223087 A223088 * A223090 A223091 A223092

Keyword

nonn,base

Author

N. J. A. Sloane, Mar 23 2013

Status

approved