Final answer:
The founders created a seal with the frequent repetition of the number 13 to symbolize the original thirteen colonies that formed the United States.
Step-by-step explanation:
The founders created a seal with the frequent repetition of the number 13 to symbolize the original thirteen colonies that formed the United States. The number 13 represents the unity and strength of these colonies that fought for independence together. The founders wanted to convey the idea that the United States was built on these thirteen colonies and their shared values.