287408domain: NAppears in sequencesNumber of ways to place a non-attacking white and black queen on n X n chessboard.at n=23A035291Dot product of the squares and the quarter-squares: a(n) = sum(i=1..n, i^2 * floor(i^2/4)).at n=21A060453Sum of divisors of Woodall (or Riesel) numbers; sigma(A003261(n)); sigma(n*2^n - 1).at n=13A063515