A099258 Inverse of A099257.

1, 3, 2, 4, 6, 7, 8, 9, 5, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 11, 22, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 23, 46, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73

Offset: 1

Author

Reinhard Zumkeller, Oct 09 2004

Keywords

• nonn

Comments

Permutation of the natural numbers;

a(A033484(n)) = A033484(n);

a(A033484(n) - 1) = A033484(n)/2 = A055010(n).

Links

• Index entries for sequences that are permutations of the natural numbers

Formula

a(n) = if n = 3*2^k - 2 then n else (if n = 3*2^k - 3 then (n + 1)/2 else n + 1).