Question 1021680
<pre>
Rule.

Start counting with 0.

1. Change to base 4, 
2. Change 2s to 3s and 3s to 2s
3. Change to base ten

0
1. Change 0 to base 4.  That's 0<sub>4</sub>. 
2. Change 2s to 3s and 3s to 2s.  There are none. Still have 0<sub>4</sub>.
3. Change to base ten.  That's 0.

1
1. Change 1 to base 4.  That's 1<sub>4</sub>. 
2. Change 2s to 3s and 3s to 2s.  There are none. Still have 1<sub>4</sub>
3. Change to base ten.  That's 1.

2
1. Change 2 to base 4.  That's 2<sub>4</sub>. 
2. Change 2s to 3s and 3s to 2s.  Change 2<sub>4</sub> to 3<sub>4</sub>. 
3. Change to base ten.  That's 3.

3
1. Change 3 to base 4.  That's 3<sub>4</sub>. 
2. Change 2s to 3s and 3s to 2s.  Change 3<sub>4</sub> to 2<sub>4</sub>
3. Change to base ten.  That's 2

4
1. Change 4 to base 4.  That's 10<sub>4</sub>. 
2. Change 2s to 3s and 3s to 2s.  There are none. Still have 10<sub>4</sub>
3. Change to base ten.  That's 4

5
1. Change 5 to base 4.  That's 11<sub>4</sub>. 
2. Change 2s to 3s and 3s to 2s.  There are none. Still have 11<sub>4</sub>
3. Change to base ten.  That's 5

6
1. Change 6 to base 4.  That's 12<sub>4</sub>. 
2. Change 2s to 3s and 3s to 2s.  Change 12<sub>4</sub> to 13<sub>4</sub>
3. Change to base ten.  That's 7

7
1. Change 7 to base 4.  That's 13<sub>4</sub>. 
2. Change 2s to 3s and 3s to 2s.  Change 13<sub>4</sub> to 12<sub>4</sub>
3. Change to base ten.  That's 6

8
1. Change 8 to base 4.  That's 20<sub>4</sub>. 
2. Change 2s to 3s and 3s to 2s.  Change 20<sub>4</sub> to 30<sub>4</sub>.
3. Change to base ten.  That's 12.

9
1. Change 9 to base 4.  That's 21<sub>4</sub>. 
2. Change 2s to 3s and 3s to 2s.  Change 21<sub>4</sub> to 31<sub>4</sub>.
3. Change to base ten.  That's 13.


1,3,2,4,5,7,6,12,13

Edwin</pre>