My understanding of the process is as follows:
Original numbers = 3 7 8 13 15 16 22 23 39 40 45 46
Add 1 to each = 4 8 9 14 16 17 23 24 40 46 47
Subtract 1 from the first number (4) and keep the 4 = 3 4
Add 1 to the second number (8) and keep the 8 = 8 9
Alternate the last two steps for the rest of the numbers and delete duplicates to get your string of numbers.
3 4 8 9 14 15 16 17 18 22 23 24 25 39 40 41 42 45 46 47 48
BTW, in this process 1-1=49 and 49+1=1.
Original numbers = 3 7 8 13 15 16 22 23 39 40 45 46
Add 1 to each = 4 8 9 14 16 17 23 24 40 46 47
Subtract 1 from the first number (4) and keep the 4 = 3 4
Add 1 to the second number (8) and keep the 8 = 8 9
Alternate the last two steps for the rest of the numbers and delete duplicates to get your string of numbers.
3 4 8 9 14 15 16 17 18 22 23 24 25 39 40 41 42 45 46 47 48
BTW, in this process 1-1=49 and 49+1=1.