A171960 Values of the 2-complement of n in ternary representation.

2, 1, 0, 5, 4, 3, 2, 1, 0, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2

Offset

0,1

Comments

a(A134026(n)) < A134026(n);

a(A003462(n)) = A003462(n);

a(A134025(n)) >= A134025(n).

Links

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Formula

a(n) = if n<3 then 2 - n else 3*a(floor(n/3)) + 2 - n mod 3.

Prog

(PARI) a(n) = 3^(if(n, logint(n, 3))+1) - 1 - n; \\ Kevin Ryde, Jul 16 2020

Crossrefs

Cf. A007089, A035327, A061601.

Sequence in context: A113368 A066435 A261301 * A330396 A182376 A030206

Adjacent sequences: A171957 A171958 A171959 * A171961 A171962 A171963

Keyword

nonn

Author

Reinhard Zumkeller, Jan 20 2010

Status

approved