Number of permutations of 1..2*n+5 with no adjacent elements within n in value.

A179963

Number of permutations of 1..2*n+5 with no adjacent elements within n in value.

Terms

    a(0) =120a(1) =646a(2) =3984a(3) =25384a(4) =161136a(5) =1019616a(6) =6433728a(7) =40495488a(8) =254319360a(9) =1593945600

External references