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Search: id:A101697
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| A101697 |
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Numbers n such that phi(n) is equal to d_1!+d_2!+...+d_k!, where d_1 d_2 ... d_k is the decimal expansion of n. |
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+0
4
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OFFSET
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1,2
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EXAMPLE
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854696 is in the sequence because phi(854696)=8!+5!+4!+6!+9!+6!.
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MATHEMATICA
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Do[h = IntegerDigits[n]; l = Length[h]; If[EulerPhi[n] == Sum[h[[k]]!, {k, l}], Print[n]], {n, 10000000}]
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CROSSREFS
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Cf. A100416.
Adjacent sequences: A101694 A101695 A101696 this_sequence A101698 A101699 A101700
Sequence in context: A092376 A043591 A022256 this_sequence A104948 A093217 A031845
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KEYWORD
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base,fini,full,nonn
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AUTHOR
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Farideh Firoozbakht (f.firoozbakht(AT)math.ui.ac.ir), Dec 12 2004
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