Number of permutations p of [n] such that (n-p(i)+i) mod n >= 6 for all i.
A184965
Number of permutations p of [n] such that (n-p(i)+i) mod n >= 6 for all i.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =1a(8) =2a(9) =78a(10) =888a(11) =13909a(12) =204448a(13) =3182225a(14) =51504968a(15) =873224962a(16) =15498424578a(17) =287972983669
External references
- oeis: A184965