79132089737domain: NAppears in sequencesa(n) = Sum_{k=0..n} (-1)^k * binomial(n+2*k,n-k) * Fibonacci(k+1).at n=28A390855a(n) = Sum_{k=0..n} (-1)^k * binomial(n+2*k+2,n-k) * Fibonacci(k+1).at n=27A390857