id:A053577 - OEIS Search Results

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Cototient function ( n-EulerPhi[n] ) is a power of 2.

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2, 3, 4, 5, 6, 7, 8, 11, 12, 13, 14, 16, 17, 19, 23, 24, 28, 29, 31, 32, 37, 41, 43, 47, 48, 53, 56, 59, 61, 62, 64, 67, 71, 73, 79, 83, 89, 96, 97, 101, 103, 107, 109, 112, 113, 124, 127, 128, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 192, 193, 197 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`A051953[n]=2^w`
	EXAMPLE	`For p prime cototient[p]=1; for x in the set {49152,57344,63488,65024,65528,65536}, x-Phi[x]=2^15=32768.`
	CROSSREFS	`Cf. A051953, A053578.` `Sequence in context: A032880 A032847 A023778 this_sequence A093515 A084369 A067133` `Adjacent sequences: A053574 A053575 A053576 this_sequence A053578 A053579 A053580`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Jan 18 2000`

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Last modified July 8 18:40 EDT 2008. Contains 141013 sequences.

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