id:A062951 - OEIS Search Results

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H(A005117(n)) where H(n) is the half-totient function and A005117(n) are the square-free numbers.

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1, 2, 1, 3, 2, 5, 6, 3, 4, 8, 9, 6, 5, 11, 6, 14, 4, 15, 10, 8, 12, 18, 9, 12, 20, 6, 21, 11, 23, 16, 26, 20, 18, 14, 29, 30, 15, 24, 10, 33, 22, 12, 35, 36, 18, 30, 12, 39, 20, 41, 32, 21, 28, 44, 36, 30, 23, 36, 48, 50, 16, 51, 24, 26, 53, 54, 20, 36, 56, 18, 44, 29, 48, 30, 40 (list; graph; listen)

	OFFSET	`3,2`
	PROGRAM	`(PARI) H(n)=eulerphi(n)/2; j=[]; for(n=3, 200, if(issquarefree(n), j=concat(j, H(n)))); j`
	CROSSREFS	`Cf. A023022, A005117.` `Sequence in context: A045931 A079974 A102517 this_sequence A145794 A014000 A075257` `Adjacent sequences: A062948 A062949 A062950 this_sequence A062952 A062953 A062954`
	KEYWORD	`nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Jul 21 2001`

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Last modified December 5 20:25 EST 2009. Contains 170428 sequences.

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