id:A078275 - OEIS Search Results

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a(n) is the number from which if odd-positioned digits are deleted then one gets the concatenation of first n even numbers, while if even-positioned digits are deleted then one gets reverse concatenation of first n even numbers. Position of least significant digit is considered to be 1.

+0
4

22, 2442, 264462, 28466482, 214068861402, 2142618018061422, 21446182110018261442, 214661841102112018461462, 2148618611041122114018661482, 22406188110611241142116018862402 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(4) = 28466482: deleting alternate digits starting from the LSD gives 2468. Deleting the other ones gives 8642.`
	CROSSREFS	`Cf. A078274, A078276, A078277, A078278.` `Sequence in context: A117990 A098130 A078278 this_sequence A128854 A114942 A155885` `Adjacent sequences: A078272 A078273 A078274 this_sequence A078276 A078277 A078278`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 25 2002`
	EXTENSIONS	`More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003`

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.

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