239841

Appears in sequences

• a(n) = S(4*n,4)/S(n,4) where S(n,m) = Sum_{k=0..n} binomial(n,k)*Fibonacci(m*k).at n=1A087424
• Expansion of (3*x+1)/(1-3*x-3*x^2).at n=9A108306
• a(0)=a(1)=1; a(n) = 3*(a(n-1) + a(n-2)).at n=10A134927