id:A059391 - OEIS Search Results

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a(1)=4; a(n) is a k(n)-almost prime; m is an A-almost prime (for 1<=A); a(n) = smallest number m>a(n-1) such that a(i)+m is a (A-k(i))-almost prime for i = 1,2,3,..,n-1.

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4, 27, 208, 18630 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Conjecture: k(n)= n-th prime (conjectured by Naohiro Nomoto). The next new term is bigger than 5*10^7.`
	CROSSREFS	`Cf. A059333. A059363.` `Sequence in context: A091125 A091121 A026005 this_sequence A161120 A121063 A051863` `Adjacent sequences: A059388 A059389 A059390 this_sequence A059392 A059393 A059394`
	KEYWORD	`hard,more,nonn`
	AUTHOR	`Naohiro Nomoto (6284968128(AT)geocities.co.jp), Jan 29 2001`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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