id:A078271 - OEIS Search Results

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

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11, 2112, 312213, 41322314, 5142332415, 615243342516, 71625344352617, 8172635445362718, 918273645546372819, 1102938475665748392110, 11121304958677685941302111, 112213141506978879615041312112 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Cf. A078269, A078270, A078272.` `Sequence in context: A060885 A020519 A004822 this_sequence A087403 A085878 A064779` `Adjacent sequences: A078268 A078269 A078270 this_sequence A078272 A078273 A078274`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 24 2002`
	EXTENSIONS	`More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003`

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

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