2467007773

Appears in sequences

• a(n) = n*a(n-1) + (n-1)*a(n-2), a(0) = 1, a(1) = 1.at n=12A000255
• Numerator of Sum_{k=0..n} (-1)^k/k!.at n=14A053557
• Bisection of A000255.at n=6A100444
• Number of permutations of {1,2,...,n} in which the fixed points and the non-fixed points alternate.at n=25A162969
• Numerator of n!*Sum((-1)^k/k!, k=0..n)/(n-1)^n.at n=12A178453