I'm not exactly what you are trying to get, but maybe parts of this are hints -
<\ _4 ]\ 3 5 7 9 13 17 21 25 31 37 43 49
+-------+-----------+-----------+
|3 5 7 9| 3 5 7 9| 3 5 7 9|
| |13 17 21 25|13 17 21 25|
| | |31 37 43 49|
+-------+-----------+-----------+
At 19:44 +0100 2011/09/25, David Vaughan wrote:
>I'm trying to apply a verb to infixes of length 4 but I want it to
>be cumulative. i.e. in the list:
>
>3 5 7 9 13 17 21 25 31 37 43 49
>
>I want:
>
>verb 3 5 7 9
>verb 3 5 7 9 13 17 21 25
>verb 3 5 7 9 13 17 21 25 31 37 43 49
>
>Any help? Thanks.
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