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EXAMPLE
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Examples of the covering sets:
- for n = 6, the set is {3, 5, 7, 13, 17, 241},
- for n = 7, the set is {3, 5, 7, 13, 19, 37, 73},
- for n = 8, the set is {3, 5, 7, 17, 19, 37, 73, 241},
- for n = 9, the set is {3, 5, 7, 11, 13, 31, 41, 61, 151},
- for n = 10, the set is {3, 5, 7, 11, 17, 31, 41, 61, 151, 241},
- for n = 11, the set is {3, 5, 7, 11, 19, 31, 37, 41, 61, 73, 151},
- for n = 12, the set is {3, 7, 11, 13, 19, 31, 37, 41, 61, 73, 109, 151},
- for n = 13, the set is {3, 7, 11, 17, 19, 31, 37, 41, 61, 73, 109, 151, 241},
- for n = 14, the set is {3, 7, 11, 17, 19, 31, 37, 41, 61, 73, 97, 109, 151, 257},
- for n = 15, the set is {3, 11, 13, 17, 19, 31, 37, 41, 61, 73, 97, 109, 151, 241, 257},
- for n = 16, the set is {5, 7, 11, 13, 17, 19, 31, 37, 41, 61, 73, 97, 109, 151, 241, 257}.
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