257000

Appears in sequences

• The Wiener index of a link of n fullerenes C_{20} (see the Ghorbani and Hosseinzadeh reference).at n=9A216114
• Number of (n+1) X (3+1) 0..2 arrays with every 2 X 2 subblock diagonal maximum minus antidiagonal minimum unequal to its neighbors horizontally, vertically, diagonally and antidiagonally.at n=10A253464