id:A079553 - OEIS Search Results

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Floor( d(n^2) / d(n) ), where d() = A000005.

+0
3

1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2, 2, 1, 1, 2, 1, 2, 2, 2, 1, 2, 1, 2, 1, 2, 1, 3, 1, 1, 2, 2, 2, 2, 1, 2, 2, 2, 1, 3, 1, 2, 2, 2, 1, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 3, 1, 2, 2, 1, 2, 3, 1, 2, 2, 3, 1, 2, 1, 2, 2, 2, 2, 3, 1, 2, 1, 2, 1, 3, 2, 2, 2, 2, 1, 3, 2, 2, 2, 2, 2, 2, 1, 2, 2, 2, 1, 3, 1, 2, 3 (list; graph; listen)

	OFFSET	`1,6`
	COMMENT	`This sequence and A087802 first differ at term 144: a(144)=3 and A087802(144)=2. This sequence and A064372 first differ at term 64: a(64)=1 and A064372(64)=2. The next difference doesn't appear until a(144)=3 and A064372(144)=2. - Rick L. Shepherd (rshepherd2(AT)hotmail.com), Mar 07 2004` `Differs from A001221 at n=1, 144, 180, 210, 216 etc. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 19 2008]`
	REFERENCES	`D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, p. 41.`
	PROGRAM	`(PARI) A079553(n)=floor(numdiv(n^2)/numdiv(n))`
	CROSSREFS	`Sequence in context: A062893 A158210 A087802 this_sequence A001221 A064372 A096825` `Adjacent sequences: A079550 A079551 A079552 this_sequence A079554 A079555 A079556`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jan 24 2003`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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