3135539

Appears in sequences

• Number of ways to move elements of an nXnXn triangular array to themselves or a neighbor, with no more than 1-1 2-cycles.at n=5A271962
• T(n,k)=Number of ways to move elements of an nXnXn triangular array to themselves or a neighbor, with no more than k-1 2-cycles.at n=20A271969