6,1

Essentially different ways 1,2,3,...n can be placed around a circle so that sums of five consecutive numbers are distinct.

Table of n, a(n) for n=6..13.

Some examples of such permutations are: 12568374; 13756824; and 16253847

Cf. A040018

Sequence in context: A133000 A033380 A094086 * A230742 A112025 A060512

Adjacent sequences: A206477 A206478 A206479 * A206481 A206482 A206483

nonn

Steve Butler, Feb 08 2012

approved