63501

Appears in sequences

• Number of column-convex polyominoes with perimeter 2n+2.at n=8A005435
• Successively larger 3-ball 'prime' ground-state site swaps of A084521 in concatenated decimal notation.at n=34A084522
• Triangle T(n,k) = 4*binomial(n,k)^2 - 3, read by rows, 0<=k<=n.at n=49A141596
• Triangle T(n,k) = 4*binomial(n,k)^2 - 3, read by rows, 0<=k<=n.at n=50A141596