[Templates] reiteration question, by increments of something other than 1

[Me]

I need to do a  FOREACH and increment by a number
other than one.

for example. I might have this..

FOREACH y = [0..40]

--> but I want to increment by 3

so, it would print..

1, 3, 6, 9 etc.. up to 40 (of course, 3 doesn't go
into 40 evently, so that last number to effectively
take a 3).

I don't want to do MOD. I want a more elequent
solution if there is one.

is there

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