id:A139318 - OEIS Search Results

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If A139317(n) = the smallest value of the form n*k +1, k = positive integer, that is coprime to all the previous terms of sequence A139317, then a(n) = k = (A139317(n)-1)/n.

+0
3

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

	OFFSET	`1,3`
	LINKS	`Leroy Quet, Home Page (listed in lieu of email address)`
	EXAMPLE	`For A139317(7) we check: 71 +1= 8, which is not coprime to A139317(1)=2. 72 +1= 15, which is not coprime to either A139317(2)=3 or to A139317(4)=5. 73 +1 = 22, which is not coprime to either A139317(1)=2 or to A139317(5)=11. But 74+1 = 29, which is coprime to terms A139317(1) through A139317(6). So a(7) = 4.`
	CROSSREFS	`Cf. A139317, A139320.` `Sequence in context: A122838 A050378 A161833 this_sequence A054541 A102722 A020475` `Adjacent sequences: A139315 A139316 A139317 this_sequence A139319 A139320 A139321`
	KEYWORD	`more,nonn`
	AUTHOR	`Leroy Quet Apr 13 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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