2158569

Appears in sequences

• a(n) = 9*a(n-1) - 9*a(n-2) for n>1, with a(0)=0, a(1)=1.at n=8A057085
• Duplicate of A057085.at n=8A084327
• Triangle, T(n, k) = (sqrt(k+1))^(n-1)*ChebyshevU(n-1, sqrt(k+1)/2), read by rows.at n=44A167925