769603

Appears in sequences

• Expansion of x*(1+x)*(1-2*x)/(1 - 2*x - x^2 + 2*x^3 - x^4).at n=21A122584
• Positive numbers y such that y^2 is of the form x^2+(x+23)^2 with integer x.at n=19A156567
• a(n) = 6*a(n-1)-a(n-2) for n > 2; a(1)=23, a(2)=115.at n=6A156568