Number of permutations p of [n] such that max_{j=1..n} |p(j)-j| = 4.

A323800

Number of permutations p of [n] such that max_{j=1..n} |p(j)-j| = 4.

Terms

    a(0) =0a(1) =42a(2) =274a(3) =1227a(4) =4833a(5) =18827a(6) =75693a(7) =304900a(8) =1212960a(9) =4753020a(10) =18410363a(11) =70943107a(12) =272701262a(13) =1046410914a(14) =4007815161a(15) =15319362279a(16) =58456445860a(17) =222775782355a(18) =848216866767

External references