218edo

218-EDO contains very accurate ratios, such as: 7/4, 11/8, 9/7, 8/7, 9/8, 10/9, 11/10, 17/16

Bold numbers are off within less than 0.1 step size

fraction:	3/2	4/3	5/4	8/5	5/3	6/5	7/4	8/7	10/9	9/5	9/8	16/9
steps in 218edo:	128	90	70	148	161	57	176	42	33	185	37	181

It's great for 2.9.7.17 subgroup, and good for 2.9.5.7.11.17 subgroup.

Tempers out 640000000000000000/635585924776181463 with patent 5, 7 and 9. This is the difference between three 7/4 ratios and sixteen 10/9 ratios stacked.

To handle accurate 3 along with everything mentioned, please explore 436edo.