520210801

Appears in sequences

• Expansion of x/(1 - x - 100*x^2).at n=9A162670
• a(n) = ((1 + sqrt(4*n^2 + 1))^n - (1 - sqrt(4*n^2 + 1))^n)/(2^n * sqrt(4*n^2 + 1)).at n=10A320565