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A226104
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Numbers n such that phi(n)+3 divides n+3.
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2
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1, 30, 42, 66, 78, 102, 114, 138, 174, 186, 195, 222, 246, 258, 282, 318, 354, 366, 402, 426, 438, 474, 498, 534, 582, 606, 618, 642, 654, 678, 762, 786, 822, 834, 894, 906, 942, 978, 1002, 1038, 1074, 1086, 1146, 1158, 1182, 1194, 1266, 1338, 1362, 1374, 1398
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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Select[Range[2000], IntegerQ[(# + 3)/(EulerPhi[#] + 3)] &]
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PROG
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(Python)
from sympy import totient as phi
def ok(n): return (n+3) % (phi(n)+3) == 0
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CROSSREFS
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Cf. A000010 (Euler's totient function).
Cf. A207574 (numbers n such that phi(n)+2 divides n+2).
Cf. A202855 (numbers n such that phi(n)-1 divides n).
Cf. A203966 (numbers n such that phi(n) divides n+1).
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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