A103298 Number of segments of a perfect ruler with length n.

0, 1, 2, 2, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14

Offset: 0

Author

Peter Luschny, Feb 28 2005

Keywords

• nonn

Comments

For definitions, references and links related to complete rulers see A103294.

Examples

			a(11)=5 means that a perfect ruler with length 11 has 5 segments.
		

Links

• F. Schwartau, Y. Schröder, L. Wolf and J. Schoebel, Table of n, a(n) for n = 0..244
• F. Schwartau, Y. Schröder, L. Wolf and J. Schoebel, MRLA search results and source code, Nov 6 2020.
• F. Schwartau, Y. Schröder, L. Wolf and J. Schoebel, Large Minimum Redundancy Linear Arrays: Systematic Search of Perfect and Optimal Rulers Exploiting Parallel Processing, IEEE Open Journal of Antennas and Propagation, 2 (2021), 79-85.
• Index entries for sequences related to perfect rulers.

Crossrefs

Cf. A046693, A103297.

Formula

a(n) = A046693(n) - 1.

Extensions

Extended using A046693 terms by Vaclav Kotesovec, Oct 20 2019