909312

Appears in sequences

• Nim product 2^n * 2^n.at n=19A006017
• (n^3+n)*4^n.at n=5A127369
• Triangle read by rows: T(n,k) = number of permutations p of [n] such that max(|p(p(i)) - i|)=k (n>=1, 0<=k<=n-1).at n=52A364817