Freebird,
I don't have a sequence but have just figured out the spiral pattern for sequencing after some experimentation.
The stars are on and the dashes are off. A star or a dash equaled 6 boxes for me (2 channels by .3 seconds).
Make a blocked chase on one string starting at 0 seconds, then copy it to the next string at .3 seconds, and then the next string at .6 seconds. Try it out on a couple of strings and you will see the pattern start to form.
Lets say you had 16 strings of 50 nodes, then at 4.8 sec you will be on string 16 of your chase but you have only used 32 channels.
So go back to string 1 and start at channel 33 and the time of 0 seconds. Start your block chase here again. This will give you about 1 and 1/2 spirals around your tree at that node and string count.
Not sure how to fill in the beginning or end yet , haven't got that far, but I hope this helps.
Brian
String 1
*----
-*---
--*--
---*-
----*
String 2
-*---
--*--
---*-
----*
String 3
--*--
---*-
----*