509626

Appears in sequences

• a(0) = 1, a(1) = 5, a(n+1) = 5*a(n) + a(n-1).at n=8A052918
• First differences of Chebyshev polynomials S(n,27) = A097781(n) with Diophantine property.at n=4A097835
• Triangle, read by rows, T(n, k) = Fibonacci(n, k), where Fibonacci(n, x) is the Fibonacci polynomial.at n=50A117715
• a(n) = n^4 + 3*n^3 - 3*n.at n=25A192398