# T-yosc, A countdown

A countdown:

4, 6, 6, 0, 3, 2, 0, 1, 2, ?

How does it end? And why?

Clarification:
The "?" stands for a number. Which one?
And of course the interesting part is: What's the rule behind this specific countdown?

Hint 1 (about the title):

While the correct answer was already given, there is this T-yosc bit of the title. As per request, here is a hint specifically about that:

a very typical countdown

Hint 2 (if Hint 1 is not enough):

...that tells you how far I turned the real hint

Hint 3 (if Hint 2 is not enough):

...or rotated

• Since you are too fast for me in solving riddles, I just post my own. I hope you like this one, I tried to verify that it has not been asked before. If necessary, hints will follow. – Karsten Köpnick Jan 19 '18 at 15:25
• Now you are also too fast for me in solving my riddles. - I need to learn. – Karsten Köpnick Jan 19 '18 at 15:50

0: this is the reverse of OEIS sequence A091967, which gives the $n$th member of OEIS sequence $\mathrm{A}n$.