2921535

Appears in sequences

• a(n) = n*(4*n - 3)*(16*n^2 - 12*n - 3).at n=15A264895
• Numbers n such that n and n+1 are primitive abundant.at n=10A283418
• Numbers k such that k and k+1 are both primitive abundant numbers (A071395).at n=3A330872
• Numbers k such that k and k+1 are both primitive Zumkeller numbers (A180332).at n=4A361934