libmath-planepath-perl 126-1 (amd64 binary) in ubuntu cosmic

 Math::PlanePath is a collection of Perl modules to enerate some paths through
 the 2-D X,Y plane, mainly integer oriented, and including
 .
  * Square numbering of Ulam's spiral
  * Pentagonal, hexagonal, heptagonal spirals
  * Pyramid and triangular spirals and rows
  * An infinite knight's tour
  * Vogel's sunflower floret (and variations)
  * Sacks' quadratic spiral
  * Spiral of Theodorus
  * Peano, Hilbert and Z-Order
  * Gosper's flowsnake
  * Koch curve and quadric curve
  * Sierpinski triangle
  * Dragon curves
  * Pixellated rings, and by hypotenuse distance
  * Trees of rationals and Pythagorean triples
  * Some complex base related patterns