The Wythoff array is an interspersion array that can be constructed by beginning with the Fibonacci numbers {F_2, F_3, F_4, F_5, ...} in the first row and then building up subsequent rows by iteratively adding {F_(3 + k), F_(4 + k), F_(5 + k), F_(6 + k), ...}, where k = 0 or 1 is the smallest offset producing an initial term that has not occurred in a previous row. This process gives the array

Beatty sequence | Fibonacci number | interspersion | Stolarsky array