1,1

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

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.

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]

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

Sequence in context: A082627 A013062 A013092 this_sequence A001114 A107615 A136583

Adjacent sequences: A104307 A104308 A104309 this_sequence A104311 A104312 A104313

hard,more,nonn

Hugo Pfoertner (hugo(AT)pfoertner.org), Mar 01 2005