id:A066231 - OEIS Search Results

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Numbers n such that EulerPhi(n) = EulerPhi(n-1)-EulerPhi(n-2).

+0
2

6, 8, 26, 78, 218, 306, 3666, 4646, 5066, 8816, 12206, 12546, 19878, 20436, 24236, 29546, 37736, 47996, 60116, 72086, 73026, 77046, 87476 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Question: Are all terms of this sequence even? (Compare A065557, whose terms could be all odd and square-free.)`
	EXAMPLE	`EulerPhi(8) = 4 = 6-2 = EulerPhi(7)-EulerPhi(6).`
	CROSSREFS	`Cf. A067701.` `Adjacent sequences: A066228 A066229 A066230 this_sequence A066232 A066233 A066234` `Sequence in context: A025100 A107366 A024873 this_sequence A007829 A000773 A039720`
	KEYWORD	`nonn`
	AUTHOR	`Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Dec 18 2001`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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