A206480 (Number of permutations of {1,2,...,n} for which sums of five consecutive numbers (with wraparound) are all distinct)/2n.

60, 46, 690, 2529, 67636, 184014, 2374017, 19353643

Offset: 6

Author

Steve Butler, Feb 08 2012

Keywords

• nonn

Comments

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

Examples

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

Crossrefs

Cf. A040018