Posted by noah on .
Input 1 2 4 5 10 12
Output 3 5 9 11 21 25
Write the rule

math 
Damon,
1 3
2 5
3 try constant difference of 2 >7
4 9
5 11
6 >13
7 >15
8 >17
9 >19
10 21
11 > 23
12 25 so it worked
accordind to my rule
0 1
so
y(n) = 2 + y(n1)
or y(n) = 1 + 2(n)
y = 2 n + 1