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A137817
Cubeful "year numbers" (such that phi(n) = 2 phi(sigma(n)):
A137815
).
+0
3
295569, 295947, 1586763, 1811079, 1964375, 2069469, 4473387, 5854375, 6820555, 7285923, 10936053, 12233457, 13260625, 18029709, 18052767, 21153663, 21576537, 21604131, 22182093, 22877451, 23744043, 25536875, 28340307, 34102775
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Maintained by
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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.
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