Maybe this will help someone on the pick 4 journey 

Break the numbers down 

5= 05, 41, 32, 221

2=11,02

8=08,44,71,62,53,224

2 = 11,02

that's the number you got broken down into what is added to get the number that follows it 

Here is another twist on how to get the number that follows it all your doing is adding numbers together so of course this is supposed to give another pair of the next number 

17= 89, 665,17, or any three sum 17 digits 

12= 93, 84, 75, 66, 12

15= 96, 87, 15

10= 55, 442, 91, 82,73, 64,

13= 94,661, 85, 229, or any sum 3 digit that equals 13

7= 07, 61, 52, 43, 223x 

9= 09,81,72,441,63,54

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SO each time the number comes out so does this example change . This example will be posted on the blog just in case you forget or it gets lost in messages . Hope I have clicked a light on and helped with this 4 numbers is like 3 numbers its just breaking the number down .