Number of permutations of [n] such that precisely one rising or falling succession occurs, but without either n(n-1) or (n-1)n.

A383857

Number of permutations of [n] such that precisely one rising or falling succession occurs, but without either n(n-1) or (n-1)n.

Terms

    a(0) =0a(1) =0a(2) =2a(3) =8a(4) =34a(5) =196a(6) =1366a(7) =10928a(8) =98330a(9) =983036a(10) =10811134a(11) =129714184a(12) =1686103522a(13) =23603603540a(14) =354033474374

External references