Hi,

> user=> (let [rs2 (r 2 true)
>              rs3 (r 3 true)]
>          (for [r2 rs2
>                r3 rs3]
>            [r2 r3]))

Note: this of course holds the head of the sequences. If this is not
desired, you will have to bite the bullet and pay the cost of multiple
calls to the seq generating functions.

Sincerely
Meikel

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