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A206480 (Number of permutations of {1,2,...,n} for which sums of five consecutive numbers (with wraparound) are all distinct)/2n 0
60, 46, 690, 2529, 67636, 184014, 2374017, 19353643 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,1

COMMENTS

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

LINKS

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

EXAMPLE

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

CROSSREFS

Cf. A040018

Sequence in context: A133000 A033380 A094086 * A230742 A112025 A060512

Adjacent sequences:  A206477 A206478 A206479 * A206481 A206482 A206483

KEYWORD

nonn

AUTHOR

Steve Butler, Feb 08 2012

STATUS

approved

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Last modified May 24 21:08 EDT 2022. Contains 354043 sequences. (Running on oeis4.)