4617761

Appears in sequences

• Octagonal numbers equal to S*(3S - 2) with 3S - 2 = k^2 and S semiprime.at n=18A124106
• Crystal ball sequence for the lattice C_4.at n=30A142993
• Octagonal numbers (A000567) that are also centered square numbers (A001844).at n=3A254896