Number of permutations of 1..2*n+4 with no adjacent elements within n in value.

A179962

Number of permutations of 1..2*n+4 with no adjacent elements within n in value.

Terms

    a(0) =24a(1) =90a(2) =368a(3) =1496a(4) =6056a(5) =24440a(6) =98408a(7) =395576a(8) =1588136a(9) =6370040a(10) =25532648a(11) =102288056

External references