a(n) = S(3*n,3)/S(n,3) where S(n,m) = Sum_{k=0..n} binomial(n,k)*Fibonacci(m*k).
A087423
a(n) = S(3*n,3)/S(n,3) where S(n,m) = Sum_{k=0..n} binomial(n,k)*Fibonacci(m*k).
Terms
- a(0) =32a(1) =768a(2) =20672a(3) =565248a(4) =15491072a(5) =424685568a(6) =11643256832a(7) =319215894528
External references
- oeis: A087423