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A066946
Numbers n such that phi(phi(n)) + sigma(sigma(n)) - phi(sigma(n)) - sigma(phi(n)) = sigma(n).
+0
3
827, 975, 1607, 13149, 20919, 34921, 58649, 202223, 347869, 545377, 900521, 1451135, 2288845, 2453509, 2804855, 3063031, 4134579, 11320177, 11446955, 14573651, 16477307, 17678225, 25164429, 27514643, 28475077, 47443799
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.
AT&T Labs Research
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