156636domain: NAppears in sequencesNumber of ways to place a non-attacking white and black king on n X n chessboard.at n=19A035286Numbers k such that k^2 divides 3*Fibonacci(k).at n=13A130164G.f. A(x) satisfies: A(x) = 1 + x*A(x)/(1 - x*A(x) - 2*x^2*A(x)^2).at n=10A307413