194881

Appears in sequences

• a(n) = Sum_{k=0..[n/2]} C(n-k,k)^(n-k)*n/(n-k), n>=1.at n=6A166895
• a(n) = 3*binomial(n,4) - 6*binomial(n,3) + 4*binomial(n,2) - 2.at n=39A335694