Number of permutations of {1,2,...,n} having exactly one string of consecutive fixed points (including singletons).

A177265

Number of permutations of {1,2,...,n} having exactly one string of consecutive fixed points (including singletons).

Terms

    a(0) =1a(1) =1a(2) =4a(3) =12a(4) =57a(5) =321a(6) =2176a(7) =17008a(8) =150505a(9) =1485465a(10) =16170036a(11) =192384876a(12) =2483177809a(13) =34554278857a(14) =515620794592

External references