A050135 a(1) = 1, a(n) = floor(a(n-1)/2) if this is not among 0,a(1),...,a(n-1); otherwise a(n) = 4*n.

1, 8, 4, 2, 20, 10, 5, 32, 16, 40, 44, 22, 11, 56, 28, 14, 7, 3, 76, 38, 19, 9, 92, 46, 23, 104, 52, 26, 13, 6, 124, 62, 31, 15, 140, 70, 35, 17, 156, 78, 39, 168, 84, 42, 21, 184, 188, 94, 47, 200, 100, 50, 25, 12, 220, 110, 55, 27, 236

Offset

1,2

Comments

Does this sequence contain every positive integer exactly once?

Links

Table of n, a(n) for n=1..59.

Crossrefs

Cf. A050000.

Sequence in context: A089729 A173670 A337170 * A109595 A256782 A071832

Adjacent sequences: A050132 A050133 A050134 * A050136 A050137 A050138

Keyword

nonn

Author

Clark Kimberling

Status

approved