A103585 Consider numbers k such that (A102370(k)-k)/2 = 1; read them mod 4 to get the sequence.

1, 3, 3, 1, 3, 3, 1, 3, 3, 1, 3, 1, 3, 3, 1, 3, 3, 1, 3, 3, 1, 3, 1, 3, 3, 1, 3, 3, 1, 3, 3, 1, 3, 1, 3, 3, 1, 3, 3, 1, 3, 3, 3, 1, 3, 3, 1, 3, 3, 1, 3, 3, 1, 3, 1, 3, 3, 1, 3, 3, 1, 3, 3, 1, 3, 1, 3, 3, 1, 3, 3, 1, 3, 3, 1, 3, 1, 3, 3, 1, 3, 3, 1, 3, 3, 3, 1, 3, 3, 1, 3, 3, 1, 3, 3, 1, 3, 1, 3

Offset

1,2

Comments

Is there a self-contained construction of this two-valued sequence?

Sequence appears to have period 43. - Ralf Stephan, May 18 2007

Links

Table of n, a(n) for n=1..99.

David Applegate, Benoit Cloitre, Philippe Deléham and N. J. A. Sloane, Sloping binary numbers: a new sequence related to the binary numbers [pdf, ps], J. Integer Seq. 8 (2005), no. 3, Article 05.3.6, 15 pp.

Example

The numbers k are 1, 3, 7, 9, 11, 15, 17, 19, ...

Crossrefs

Cf. A102370, A103587.

Sequence in context: A293862 A295676 A088420 * A154595 A144437 A169609

Adjacent sequences: A103582 A103583 A103584 * A103586 A103587 A103588

Keyword

nonn,base

Author

Benoit Cloitre and Philippe Deléham, Mar 24 2005

Status

approved