id:A161539 - OEIS Search Results

Search: id:A161539

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Numbers n such that composite (n) + n is a composite , where composite (n) denotes the n-th composite number.

+0
1

2, 5, 6, 7, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 46, 48, 49, 50, 51, 52, 53, 54, 55, 56, 59, 60, 61, 62, 63, 64, 65, 67, 68, 70, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 85, 86, 87, 88, 89 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`2 is in the list because composite(2)+2 =6+2 = 8 and 8 is composite` `5 is in the list because composite(5)+5 =10+5 = 15 and 15 is composite`
	CROSSREFS	`A002808` `Sequence in context: A014355 A048972 A050103 this_sequence A047580 A153384 A102657` `Adjacent sequences: A161536 A161537 A161538 this_sequence A161540 A161541 A161542`
	KEYWORD	`nonn`
	AUTHOR	`Claudio L Meller (claudiomeller(AT)gmail.com), Jun 13 2009`

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.

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