It's been a while since I've done this, and I'm embarrassed to ask but here goes: I'm trying to come up with a simple math expression to capture a numeric sequence using the "%" (modulus operator). I'm trying to capture two patterns the first being: 
2,7,12,17...

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and the second being: 
3,8,13,18...

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my thoughts are: 
[(8%3) += 5]
[(8%3) += 6]

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This works fine but I have to look at this expression for every iteration of a while loop so I need some way of retaining the value for each comparison, and it doesn't capture the first 2 or 3 values
Any thoughts?

In reply to What should be an easy math question using % by Anonymous Monk

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