Press space to change the list of numbers. Click on the cat to calculate the Frobenius number of the numbers in the list. The Frobenius number of a set of natural numbers is the largest natural number that cannot be made by a sum of the multiples of the set numbers. For example, the Frobenius number of {6, 9, 20} is 43 and the Frobenius number of {4, 14, 17} is 13.
https://en.wikipedia.org/wiki/Coin_problem#Examples shows a great example for finding a Frobenius number.