[jules]

That is not true, you just happened to choose lucky starting numbers. For example consider this one: choose a number between 1 and 10000. Generate the sequence between 9000000 and 9000000+(your number). Everything starts with 9.

Benfords law applies only to exponential growth over a long timescale.

[rudiger]

It actually applies to more than just exponential growth. Fibonacci and factorial growth rates also follow Benford's Law.