82872

Appears in sequences

• a(n) = 64*n^2 - 2*n.at n=35A158067
• Numbers k such that the decimal digits of k*(k+1) are a permutation of those of k*(k-1).at n=27A181775
• Number of (n+2) X (2+2) 0..2 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=9A252855
• 'Geobonnaci' sequence: a(1)=a(2)=1, thereafter a(n) = round( 2 * sqrt(a(n-1) * a(n-2)) ).at n=25A322332