id:A066955 - OEIS Search Results

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Number of unordered solutions of xy+yz+zx=n, x,y,z>0.

+0
1

0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 2, 1, 1, 1, 2, 1, 2, 0, 2, 2, 2, 0, 3, 2, 1, 2, 3, 1, 3, 0, 3, 3, 2, 1, 4, 2, 1, 2, 4, 2, 4, 0, 2, 4, 3, 1, 5, 3, 2, 2, 4, 2, 3, 2, 4, 5, 2, 0, 6, 2, 3, 3, 5, 3, 4, 2, 2, 5, 4, 0, 7, 3, 2, 4, 5, 4, 4, 0, 5, 6, 4, 1, 6, 4, 2, 4, 6, 2, 6, 2, 4, 5, 2, 3, 8, 6, 2, 3, 6, 2, 7, 0, 5, 8, 4 (list; graph; listen)

	OFFSET	`1,11`
	PROGRAM	`(PARI) a(n)=sum(i=1, n, sum(j=1, i, sum(k=1, j, if(ij+jk+k*i-n, 0, 1))))`
	CROSSREFS	`Adjacent sequences: A066952 A066953 A066954 this_sequence A066956 A066957 A066958` `Sequence in context: A118107 A055652 A133831 this_sequence A089048 A133162 A079806`
	KEYWORD	`nonn,easy`
	AUTHOR	`Colin Mallows (colinm(AT)research.avayalabs.com) Jan 26 2002`
	EXTENSIONS	`More terms from Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 02 2003`

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Last modified May 16 01:24 EDT 2008. Contains 139630 sequences.

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