OFFSET

0,2

COMMENTS

This sequence is a self-inverse permutation of the nonnegative integers.

LINKS

Rémy Sigrist, Table of n, a(n) for n = 0..2187

Rémy Sigrist, PARI program

EXAMPLE

The first terms, alongside the balanced ternary expansion of n * a(n), are:

n a(n) bter(n*a(n))

-- ---- ------------

0 0 0

1 2 1T

2 1 1T

3 6 1T00

4 4 1TT1

5 12 1T1T0

6 3 1T00

7 8 1T01T

8 7 1T01T

9 16 1TT100

10 13 1TTT11

11 14 1T0T01

12 5 1T1T0

PROG

(PARI) See Links section.

CROSSREFS

KEYWORD

nonn,base

AUTHOR

Rémy Sigrist, Jul 11 2022

STATUS

approved