hide/unhide rows based on reference to cell that contains a formula result (vlookup)

I the attached example, I want to use VB to hide or unhide rows 16-17 based on the result of a formula in cell O8; if it is not possible to reference the result of a formula versus a value, the I could reference cell A3 (which contains values that change) but I would want to specify that if A3 = 1, 2, 6, 7, 12, ...(~35 total discrete values) then rows 16-17 should display and otherwise should be hidden. Any help is very much appreciated.