132498

Appears in sequences

• a(n) = 7*a(n-1) + a(n-2), starting with a(0) = 2 and a(1) = 7.at n=6A086902
• Twice Chebyshev polynomials of the first kind, T(n,x), evaluated at x=51/2.at n=3A099368
• Coefficient a(n) of three-term recurrence relation for solutions of the equation in integers x^2-n*floor(x/sqrt(n))^2=1 such that x(i+2)=a(n)*x(i+1)-x(i). n is a nonsquare number.at n=45A180495
• Numbers of the form k^2 + 2 that are the sums of two squares.at n=29A329170
• Number of corona for a hexagon of edge n with diamonds of side 1.at n=6A380346