34988311

Properties

Appears in sequences

• a(n) = 9*a(n-1) - a(n-2) for n > 0, a(0)=1, a(-1)=1.at n=8A070998
• Triangle T(n, k) = (k*ChebyshevU(n, (k+2)/2) + 2*ChebyshevT(n+1, (k+2)/2))/2.at n=27A121872
• Define a(x,y) to be 1 if x is 0 or 1 and y*a(x-1,y)-a(x-2,y) otherwise. Then the n-th term of the sequence is a(n,n).at n=9A218219
• Prime numbersat n=2146098