bash increment in a given way



It's ok, that i can use this, when i want an incrementing sequence, in a given way:

# {START..END..INCREMENT}
$ for i in {0..10..2}; do echo "Welcome $i times"; done
Welcome 0 times
Welcome 2 times
Welcome 4 times
Welcome 6 times
Welcome 8 times
Welcome 10 times
$

but what's the "magic" for this? :

$ MAGIC; do echo "Welcome $i times"; done
Welcome 0 times
Welcome 1 times
Welcome 4 times
Welcome 5 times
Welcome 8 times
Welcome 9 times
$

thanks:\