A171960 - OEIS

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

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OFFSET

0,1

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.

a(A134026(n)) < A134026(n).

a(A003462(n)) = A003462(n).

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

MATHEMATICA

a[n_] := 3^(1 + Floor[Log[3, n]]) - n - 1; a[0] = 2; Array[a, 100] (* Amiram Eldar, Apr 03 2025 *)