id:A092021 - OEIS Search Results

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A092021

Numbers n such that n-th prime + n-th semiprime is semiprime.

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1

1, 2, 3, 5, 7, 10, 15, 19, 22, 24, 26, 27, 31, 36, 41, 44, 57, 60, 67, 78, 84, 87, 91, 93, 101, 102, 103, 104, 105, 107, 115, 116, 120, 121, 124, 126, 128, 129, 131, 135, 136, 137, 138, 140, 151, 161, 168, 183, 186, 189, 190, 191, 195, 208, 215, 225, 227, 228, 231 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`3 is a member because third prime is 5, third semiprime is 9, and` `5+9=14 is semiprime.`
	CROSSREFS	`Cf. A092108.` `Sequence in context: A005688 A120446 A082531 this_sequence A022475 A011972 A076972` `Adjacent sequences: A092018 A092019 A092020 this_sequence A092022 A092023 A092024`
	KEYWORD	`easy,nonn`
	AUTHOR	`Ray Chandler (rayjchandler(AT)sbcglobal.net), Feb 24 2004`

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

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