For definitions, references and links related to complete rulers see A103294.
Table of n, a(n) for n=0..19.
Index entries for sequences related to perfect rulers.
a(n) = A004137(n+1) - A004137(n) for n>= 1.
a(5)=4 because a perfect ruler with 5 segments may have the length 10, 11, 12 or 13.
Sequence in context: A318283 A105677 A230476 * A274017 A238221 A168173
Adjacent sequences: A103294 A103295 A103296 * A103298 A103299 A103300
Peter Luschny Feb 28 2005