15811496domain: NAppears in sequencesa(n) = (Fibonacci(6*n+3) - 2)/4.at n=6A053606a(n) = a(n-1) + a(n-2) + 1 if n is a multiple of 6, otherwise a(n) = a(n-1) + a(n-2).at n=35A131132a(n) is the integer k that minimizes |k/Fibonacci(n) - 1/4|.at n=39A293553