90498

Appears in sequences

• Numbers k such that k and k^2 use only the digits 0, 1, 4, 8 and 9.at n=45A136867
• Expansion of -(x*(1-sqrt((2*(1-sqrt(4*x^2+1)))/x+1)))/(1-sqrt(4*x^2+1)) - 1.at n=12A243814
• Expansion of (x*sqrt(4*x^2+1)-x)/(x*sqrt(-(2*sqrt(4*x^2+1)-x-2)/x) + sqrt(4*x^2+1)-x-1).at n=13A243816