2197265625

Appears in sequences

• Numbers n such that reciprocal of n terminates with an infinite repetition of digit 1. Multiples of 10 are omitted.at n=6A064560
• Fifth column of triangle A067402.at n=7A067405
• Odd solutions of phi(sigma(k)) = sigma(phi(k)).at n=15A159939
• Number of nX3 array permutations with each element not moved or moved diagonally or antidiagonally by one.at n=13A189274
• Expansion of g.f. (1+4*x)/(1-5*x).at n=13A270567
• Integers k such that both k and k^3-1 are the sum of two positive cubes (see A003325).at n=16A271717