Conditional formula to return true/false, based on the values of a group of cells

[FlynnXYZ]

I need to check true/false based on the values of 5 cells, I cannot have the numbers in the array be followed by the next more than 2 times.

Example:

1,2,5,7,9 true

1,2,3,5,8 false

10,11,12,13,18 false

Any thoughts on how to achieve this?

 

[FlynnXYZ]

You are very welcome!

If the expected result is True in the mentioned case you need the array formula i posted above. I've tried to create a regular formula (non-array) to no avail .
Maybe someone else...

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M.

The array formula will do fine.
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