id:A081485 - OEIS Search Results

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Triangle read by rows in which the n-th row contains the smallest set of n coprime numbers with a sum which is a multiple of n.

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4

1, 1, 3, 1, 2, 3, 1, 3, 5, 7, 1, 2, 3, 5, 19, 1, 3, 5, 7, 13, 19, 1, 2, 3, 5, 7, 11, 13, 1, 3, 5, 7, 11, 13, 17, 23, 1, 2, 3, 5, 7, 11, 13, 17, 31, 1, 3, 5, 7, 11, 13, 17, 19, 23, 31, 1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 31, 1, 3, 5, 7, 11, 13, 17, 19, 23, 29, 41, 47, 1, 2, 3, 5, 7, 11, 13, 17 (list; table; graph; listen)

	OFFSET	`1,3`
	COMMENT	`In the row for 6 the fifth term is 13 and not 11 as this forces the sixth term divisible by (not coprime to 3) 3. For even n all the terms have to be odd. This sequence set should exhibit some interesting properties and needs attention.`
	EXAMPLE	`Triangle begins` `1` `1 3` `1 2 3` `1 3 5 7` `1 2 3 5 19` `1 3 5 7 13 19`
	CROSSREFS	`Cf. A081486, A081487, A081488.` `Adjacent sequences: A081482 A081483 A081484 this_sequence A081486 A081487 A081488` `Sequence in context: A079723 A080511 A132399 this_sequence A100337 A036584 A029279`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 24 2003`
	EXTENSIONS	`Corrected and extended by David Wasserman (wasserma(AT)spawar.navy.mil), Jun 03 2004`

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Last modified October 11 13:47 EDT 2008. Contains 144830 sequences.

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