You choose Your Sequence's Name, 1st number and 2nd number. the program writes the first 50 numbers of it. For example: If Both numbers are 1, it gives the Fibonacci Sequence: 1 1 2 3 5 8 13 21 34 55 89 etc. (each number is a sum of the last two numbers before it ) First number DOESN'T HAVE TO BE BIGGER THAN THE SECOND !
Everything by me.