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Search: id:A060673
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| A060673 |
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phi(x) = n has exactly 10 solutions. |
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+0
1
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| 24, 80, 180, 256, 264, 828, 1188, 1640, 1968, 2024, 2368, 2544, 2720, 2772, 2904, 3036, 3136, 3144, 3328, 3392, 3420, 4192, 4392, 4464, 4600, 5000, 5312, 5504, 5508, 5688, 5728, 5796, 5800, 6208, 6228, 6732, 6888, 7000, 7232, 7740, 7956, 8388, 8576
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OFFSET
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1,1
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EXAMPLE
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24 = phi(35) = phi(39) = phi(45) = phi(52) = phi(56) = phi(70) = phi(72) = phi(78) = phi(84) = phi(90).
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MATHEMATICA
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a = Table[ 0, {10000} ]; Do[ p = EulerPhi[ n ]; If[ p < 10001, a[ [ p ] ]++ ], {n, 1, 35000} ]; Select[ Range[ 10000 ], a[ [ # ] ] == 10 & ]
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CROSSREFS
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Cf. A007366, A007367.
Sequence in context: A124140 A114818 A068379 this_sequence A030622 A063456 A045946
Adjacent sequences: A060670 A060671 A060672 this_sequence A060674 A060675 A060676
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KEYWORD
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nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 18 2001
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