A meet-in-the-middle algorithm for finding extremal restricted additive   2-bases
  An additive 2-basis with range n is restricted if its largest element is n/2. Among the restricted 2-bases of given length k, the ones that have the greatest range are extremal restricted. We describe an algorithm that finds the extremal restricted 2-bases of a given length, and we list them for lengths up to k = 41. 
Jukka Kohonen
math.NT math.CO