[Haskell] Memoization in Haskell

[Bright Sun]

I can not understand memoization in Haskell.  I can
not find an example except the fib.

For example, I want drop a list 4 times like, 

>drop 4 (drop 3 (drop 2 (drop 1
[1,2,3,4,5,6,7,8,9,10,11,12])))
>[11,12]

can I implement a memoization funcation like

>droploop [1,2,3,4] [1,2,3,4,5,6,7,8,9,10,11,12]
to get same result
>[11,12]

so, if possible to do it?  or any other example like
it?

Bright

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