128548domain: NAppears in sequencesNumber of knot diagrams of type 2PI with n crossings and two outgoing strings.at n=11A067648Partial sums of floor(Fibonacci(n)/4).at n=27A179006Number of n X 5 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 0 1 and 1 1 0 vertically.at n=10A207935