Write a function that takes a number n as input and finds the first set of n primes such that the first and last have the same digit sum. For example, if the function is given 
, it should return [2 11] because those numbers begin and end the string of 5 primes—2, 3, 5, 7, 11.
, it should return [2 11] because those numbers begin and end the string of 5 primes—2, 3, 5, 7, 11. See also Cody Problem 50933
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