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A104310 Maximum length of perfect rulers that can be made from segments not exceeding n. 2
2, 7, 18, 25, 32, 59, 71 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Extension: a(8)=81 is a conjectured continuation. For nomenclature related to perfect and optimal rulers see Peter Luschny's "Perfect Rulers" web pages.

LINKS

Table of n, a(n) for n=1..7.

Peter Luschny, Perfect and Optimal Rulers. A short introduction.

Hugo Pfoertner, Largest and smallest maximum differences of consecutive marks of perfect rulers.

Index entries for sequences related to perfect rulers.

EXAMPLE

The complete list of these rulers starts:

n.a(n)..rulers

1..2....[0,1,2]

2..7....[0,1,3,5,7]

3.18....[0,1,4,7,10,13,16]

4.25....[0,1,2,6,10,13,17,21,25]

........[0,1,2,6,10,14,17,21,25]

........[0,1,2,6,10,14,18,21,25]

........[0,1,3,7,11,15,19,23,25]

5.37....[0,1,2,3,8,13,18,23,28,33,37]

6.59....[0,1,4,10,16,22,28,34,40,46,52,54,57,59]

CROSSREFS

Cf. A104307 Least maximum of differences between consecutive marks, A104309 minimum length of perfect rulers containing a segment of length n, A103294 definitions related to complete rulers.

Sequence in context: A220396 A217253 A268837 * A301325 A001114 A107615

Adjacent sequences:  A104307 A104308 A104309 * A104311 A104312 A104313

KEYWORD

hard,more,nonn

AUTHOR

Hugo Pfoertner, Mar 01 2005

STATUS

approved

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Last modified January 22 19:01 EST 2019. Contains 319365 sequences. (Running on oeis4.)