831985domain: NAppears in sequencesHit polynomials; convolution of natural numbers with Fibonacci numbers F(2), F(3), F(4), ....at n=25A001891a(n) = F(8*n)/L(2*n) with n >= 0, F = A000045 (Fibonacci numbers) and L = A000032 (Lucas numbers).at n=5A215042a(n) = gcd(A330050(n), A330051(n)).at n=19A329421