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A079445
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phi(n)*[n-phi(n)]-1 is prime.
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1
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4, 5, 6, 7, 9, 10, 12, 13, 14, 18, 19, 21, 24, 26, 28, 31, 35, 38, 39, 40, 42, 43, 44, 45, 49, 50, 51, 54, 55, 58, 61, 63, 66, 68, 70, 72, 73, 74, 75, 76, 77, 84, 86, 90, 91, 92, 93, 94, 98, 99, 100
(list; graph; refs; listen; history; internal format)
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