392743957

Appears in sequences

• Number of connected permutations of [1..n] (those not fixing [1..j] for 0 < j < n). Also called indecomposable permutations, or irreducible permutations.at n=12A003319
• A recurrent sequence in Panaitopol's formula for pi(x), where pi(x) is the number of primes <= x.at n=11A233824
• Bisection of A003319: a(n) = A003319(2n).at n=6A272656