The following pictures show n unit equilateral triangles packed inside the smallest known tan (with short side length s).
1. 
s = 1.22474+
Trivial.
2. 
s = √3 = 1.73205+
Trivial.
3. 
s = 1.93185+
Trivial.
4. 
s = 2.36602+
Found by Jonathan Viquerat
in May 2026
5. 
s = 2.53905+
Found by Jonathan Viquerat
in May 2026
6. 
s = 2.63896+
Found by Jonathan Viquerat
in May 2026
7. 
s = 2.78972+
Found by Jonathan Viquerat
in May 2026
8. 
s = 3.07313+
Found by Jonathan Viquerat
in May 2026
9. 
s = 3.18252+
Found by Jonathan Viquerat
in May 2026
10. 
s = 3.34084+
Found by Jonathan Viquerat
in May 2026
11. 
s = 3.46951+
Found by Jonathan Viquerat
in May 2026
12. 
s = 3.62500+
Found by Jonathan Viquerat
in May 2026
13. 
s = 3.71163+
Found by Jonathan Viquerat
in May 2026
14. 
s = 3.88268+
Found by Jonathan Viquerat
in May 2026
15. 
s = 3.98382+
Found by Thomas Greenleaf
in June 2026
16. 
s = 4.03901+
Found by Thomas Greenleaf
in June 2026
17. 
s = 4.20273+
Found by Jonathan Viquerat
in May 2026
18. 
s = 4.27120+
Found by Thomas Greenleaf
in June 2026
19. 
s = 4.45701+
Found by Thomas Greenleaf
in June 2026
20. 
s = 4.56124+
Found by Thomas Greenleaf
in June 2026
21.-22. 
s = 4.73304+
Found by Thomas Greenleaf
in June 2026
23. 
s = 4.85921+
Found by Thomas Greenleaf
in June 2026