416/405

416/405, the oceanfront comma, is a 13-limit medium comma. It is the amount by which 13/10 exceeds 81/64, as well as the amount by which 15/13 falls short of 32/27. The name was given by Tristan Bay in 2025 due to its significance in being tempered out in oceanfront temperament.

Interval information

Ratio	416/405
Factorization	25 × 3-4 × 5-1 × 13
Monzo	[5 -4 -1 0 0 1⟩
Size in cents	46.39394¢
Name	oceanfront comma
Color name	3og2, thogu 2nd
FJS name	[math]\displaystyle{ \text{d2}^{13}_{5} }[/math]
Special properties	reduced
Tenney norm (log2 nd)	17.3622
Weil norm (log2 max(n, d))	17.4009
Wilson norm (sopfr(nd))	40
Comma size	medium
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