id:A062824 - OEIS Search Results

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Ch(A005117(n)) where Ch(n) is Chowla's function and A005117(n) are the square-free numbers.

+0
1

-1, 0, 0, 0, 5, 0, 7, 0, 0, 9, 8, 0, 0, 10, 13, 0, 15, 0, 41, 0, 14, 19, 12, 0, 21, 16, 0, 53, 0, 25, 0, 20, 0, 16, 22, 31, 0, 0, 33, 18, 77, 0, 26, 73, 0, 0, 39, 18, 89, 0, 43, 0, 22, 45, 32, 0, 20, 34, 49, 24, 0, 0, 113, 0, 86, 55, 0, 0, 105, 40, 0, 125, 28, 61, 24, 63, 44, 0, 46, 121, 0, 26, 69, 0, 149, 0, 50, 73, 24, 34, 75, 0 (list; graph; listen)

	OFFSET	`1,5`
	PROGRAM	`(PARI) j=[]; for(n=1, 150, if(issquarefree(n), j=concat(j, sigma(n)-n-1), )); j`
	CROSSREFS	`Sequence in context: A069206 A145091 A091685 this_sequence A134828 A070595 A021873` `Adjacent sequences: A062821 A062822 A062823 this_sequence A062825 A062826 A062827`
	KEYWORD	`easy,sign`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Jul 20 2001`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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