diagrams -- Ferrers diagrams contained in a rectangle

• Usage:

  diagrams(k,n)

• Inputs:
  • k, an integer, maximum size of each entry in diagram
  • n, an integer, number of entries in diagram
• Outputs:
  • a list of lists of integers $\{a_1, \dots, a_n\}$ such that $k \geq a_1 \geq ... \geq a_n \geq 0$