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

A206478

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

Terms

    a(0) =12a(1) =8a(2) =76a(3) =694a(4) =2529a(5) =23679a(6) =177885a(7) =1482021a(8) =14666021

External references