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A116031
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sigma(n)-phi(n) and sigma(n)+phi(n) are two palindromes greater than 2.
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1
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4, 388, 403, 10010, 11481, 12215, 41242, 42173, 44243, 223261, 223487, 403303, 2302031, 3288877, 3490447, 32605627, 40077553, 40162802, 42311323, 44044043, 117426509, 222613051, 230777581, 232075811, 287772226, 307222207, 327067459
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