id:A066219 - OEIS Search Results

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n at which EulerPhi is changing as fast as d, i.e. |EulerPhi(n+1)-EulerPhi(n)| = |d(n+1)-d(n)|, where d(n) denotes the number of divisors of n.

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5, 7, 45, 104, 105, 345 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`\|EulerPhi(6)-EulerPhi(5)\| = \|2-4\| = \|4-2\| = \|d(6)-d(5)\|`
	CROSSREFS	`Sequence in context: A098512 A064082 A090520 this_sequence A075830 A058313 A120301` `Adjacent sequences: A066216 A066217 A066218 this_sequence A066220 A066221 A066222`
	KEYWORD	`nonn`
	AUTHOR	`Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Dec 17 2001`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.