Re: Alternating Periodic Sequences

I see two cases of alternating periodic sequences that seem compelling to calculate

Case 1) 9th of year = 11 / 8 months
mean yerm of 9ths = 1 / [ 2 - ( 729 / Y ) ]
octaeteris year = Y = 365 & 187 / 424 days
mean yerm of 9ths = 194 & 45 / 266 days = 212 / 399 Y
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Case 2) 8th of year = 17 / 11 months
mean yerm of 8ths = 1 / [ 2 - ( 728 / Y ) ]
11-L'S year = Y = 365 & 29 / 275 days
mean yerm of 8ths = 165 & 21 / 152 days
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and these cases, used for a calendar, reckon for the 11 and 17 month interval