MC: Faster User-RPL HILBERT

[Juan14]

A solution using DOSUBS:

«
→ n
«
{} 1 n 2 * 1 - FOR j j INV + NEXT
n « n →LIST » DOSUBS AXL
»
»

The first line generates a list of the inverse of numbers from 1 to 2*n-1.
The second line creates a list of lists, the first lists takes n elements starting at the first element, the second list take n elements too, but starts at the second element and so on until all the lists of n elements are exhausted, finally AXL converts the list of lists into a matrix. I can't check the running time.