78472

Appears in sequences

• Denominators of continued fraction convergents to sqrt(72).at n=7A041127
• Denominators of continued fraction convergents to sqrt(648).at n=7A042245
• a(n) = (1/24)*(n+1)*(n+3)*(n^2+22*n+88).at n=32A090950
• Expansion of (1+4*x+x^2)/((1+x)^2*(1-x)^5).at n=31A233329
• Solutions x to the negative Pell equation y^2 = 72*x^2 - 1331712 with x,y >= 0.at n=12A281241