69650

Appears in sequences

• Number of (3+2) X (n+2) 0..3 arrays with every consecutive three elements in every row and diagonal having exactly two distinct values, and in every column and antidiagonal not having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=34A252722
• Number of regions in a regular drawing of the complete bipartite graph K_{n,n}.at n=25A290131
• Expansion of Sum_{k>0} x^(2*k)/(1 - k*x^k)^3.at n=34A363643