A163656 - OEIS

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A163656

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

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; refs; listen; history; internal format)

	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 * A100915 A144922 A185595` `Adjacent sequences: A163653 A163654 A163655 * 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 February 17 19:13 EST 2012. Contains 206085 sequences.