252160

Appears in sequences

• Scaled Chebyshev U-polynomials evaluated at i. Generalized Fibonacci sequence.at n=8A057087
• Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 3 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 3 6 or 7.at n=7A252106
• a(n) = ((6n-5)!!!+(6n-4)!!!)/(6n-3).at n=3A274117
• G.f. A(x) satisfies: 3 = Sum_{n>=0} (2/3)^n * (1 + x)^(n^2) / A(x)^n.at n=4A303291