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A098271
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Nonprime numbers n such that phi(n) divides (n^2 -1), where phi(n) (A000010) is Euler's totient function.
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1
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1, 15, 35, 65, 91, 255, 377, 559, 1295, 2001, 2059, 2431, 4081, 7743, 8911, 10745, 12851, 22791, 26335, 39689, 51271, 61699, 65535, 73151, 95201, 97681, 112897, 114191, 139231, 150177, 184255, 216545, 229503, 286937, 294785, 296191, 334369
(list; graph; refs; listen; history; internal format)
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