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

A206477

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

Terms

    a(0) =3a(1) =3a(2) =36a(3) =76a(4) =690a(5) =2996a(6) =22368a(7) =147472a(8) =1284653a(9) =11006509

External references