id:A065155 - OEIS Search Results

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Cototient-of-totient > totient-of-cototient.

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5, 7, 9, 11, 13, 17, 19, 21, 22, 23, 25, 26, 27, 29, 31, 34, 35, 37, 38, 39, 41, 43, 44, 45, 46, 47, 49, 50, 52, 53, 55, 57, 58, 59, 61, 62, 63, 65, 67, 68, 69, 71, 73, 74, 76, 77, 79, 81, 82, 83, 85, 86, 87, 88, 89, 91, 92, 93, 94, 95, 97, 98, 99, 100, 101, 103, 104, 106 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`Primes except 2 and 3 are here. E.g. p=101, Phi[101]=100,Cototient[101]=1, Phi[1]=1<Cototient[100]=40.`
	MATHEMATICA	`Flatten[Position[Sign[t], 1]], where t=Table[co[eu[w]]-eu[co[w]], {w, 1, 256}] and eu[x_] := EulerPhi[x]; co[x_] := x-EulerPhi[x]`
	CROSSREFS	`Cf. A000010, A051953, A065152-A065154.` `Sequence in context: A031102 A005763 A035034 this_sequence A088502 A081001 A075025` `Adjacent sequences: A065152 A065153 A065154 this_sequence A065156 A065157 A065158`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Oct 19 2001`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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