id:A163656 - OEIS Search Results

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Arithmetic mean of the n-th and (n+1)st twin prime member A001097.

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4, 6, 9, 12, 15, 18, 24, 30, 36, 42, 51, 60, 66, 72, 87, 102, 105, 108, 123, 138, 144, 150, 165, 180, 186, 192, 195, 198, 213, 228, 234, 240, 255, 270, 276, 282, 297, 312, 330, 348, 384, 420, 426, 432, 447, 462, 492, 522, 546, 570, 585, 600, 609, 618, 630, 642 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n)=(A001097(n)+A001097(n+1))/2.`
	EXAMPLE	`a(1)=4 =(3+5)/2.`
	CROSSREFS	`Cf. A014574 (bisection).` `Sequence in context: A157124 A162735 A024675 this_sequence A100915 A144922 A088765` `Adjacent sequences: A163653 A163654 A163655 this_sequence A163657 A163658 A163659`
	KEYWORD	`nonn`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Aug 02 2009`
	EXTENSIONS	`35 replaced by 36 - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 06 2009`

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

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