id:A139320 - OEIS Search Results

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If A139319(n) = the smallest value of the form n*k - 1, k = positive integer, that is coprime to all the previous terms of sequence A139319, and A139319(1)=1, then a(n) = k = (A139319(n)+1)/n.

+0
3

2, 1, 1, 1, 4, 1, 2, 1, 2, 3, 4, 1 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`For A139319(10) we check: 101 - 1= 9, which is not coprime to A139319(4)=3. 102 - 1= 19, which is not coprime to A139319(5)=19. But 10*3 - 1 = 29, which is coprime to terms A139319(1) through A139319(9). So a(10) = 3.`
	CROSSREFS	`Cf. A139318, A139319.` `Adjacent sequences: A139317 A139318 A139319 this_sequence A139321 A139322 A139323` `Sequence in context: A067856 A122374 A010121 this_sequence A118106 A143201 A112331`
	KEYWORD	`more,nonn`
	AUTHOR	`Leroy Quet (qq-quet(AT)mindspring.com), Apr 13 2008`

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

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