uiua 0.18.1

A stack-based array programming language
Documentation 
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# Creates a number spiral that is common in code golf problems
F ← ⌝⊡⊃(
  ⟜(↘¯1 ▽⊃(▽2+1⇡|◿4⇡+⊸-1) # Orientations
    ⊏⊙A₂                  # Directions
    ⊂0\+                  # Offsets
  )
  +¤⌊÷2˙⊟ # Indices
| +1⇡˙×   # Numbers
)

F 3
F 5
F 7