id:A079581 - OEIS Search Results

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Consider pairs (r,s) such that the polynomial (x^r+1) divides (x^s+1) and 1 <= r < s. This sequence gives the s values; A079673 gives the r values.

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4

3, 5, 6, 7, 9, 9, 10, 11, 12, 13, 14, 15, 15, 15, 17, 18, 18, 19, 20, 21, 21, 21, 22, 23, 24, 25, 25, 26, 27, 27, 27, 28, 29, 30, 30, 30, 31, 33, 33, 33, 34, 35, 35, 35, 36, 36, 37, 38, 39, 39, 39, 40, 41, 42, 42, 42, 43, 44, 45, 45, 45, 45, 45, 46, 47, 48, 49, 49, 50, 50, 51 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`(x^r+1) divides (x^s+1) iff s/r is an odd integer.`
	EXAMPLE	`9 is in the sequence twice because (x^1+1) and (x^3+1) divide (x^9+1).`
	CROSSREFS	`Cf. A079665, A079672, A079673.` `Sequence in context: A047583 A010906 A114309 this_sequence A057716 A138591 A136492` `Adjacent sequences: A079578 A079579 A079580 this_sequence A079582 A079583 A079584`
	KEYWORD	`nonn`
	AUTHOR	`Jose R. Brox (tautocrona(AT)terra.es), Jan 25 2003`
	EXTENSIONS	`Edited by Don Reble (djr(AT)nk.ca), Jun 12 2003`

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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.

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