id:A128688 - OEIS Search Results

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a(1)=1. For n>1, a(n) is the smallest even number such that every subset of a(1), ..., a(n) adds to a nonprime.

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1, 8, 24, 86, 90, 780, 5940, 52350, 278460, 40768260 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`The first 7 terms are from Rivera's puzzle 84.`
	LINKS	`Carlos Rivera, Puzzle 84`
	CROSSREFS	`Cf. A052349 (no restrictions on even or odd), A128687 (restricted to odd numbers).` `Sequence in context: A078158 A116486 A097544 this_sequence A019260 A019221 A063515` `Adjacent sequences: A128685 A128686 A128687 this_sequence A128689 A128690 A128691`
	KEYWORD	`hard,nonn`
	AUTHOR	`T. D. Noe (noe(AT)sspectra.com), Mar 20 2007`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.