id:A104759 - OEIS Search Results

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Concatenation of digits of natural numbers from n down to 1.

+0
20

1, 21, 321, 4321, 54321, 654321, 7654321, 87654321, 987654321, 1987654321, 1987654321, 101987654321, 1101987654321, 11101987654321, 211101987654321, 1211101987654321, 31211101987654321, 131211101987654321 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Eric Weisstein's World of Mathematics, Consecutive numbers sequences.`
	EXAMPLE	`a(11) = a(10) because no number may begin with 0`
	CROSSREFS	`Cf. A014925, A000422, A057138, A060554...` `Sequence in context: A113531 A069572 A057138 this_sequence A138793 A014925 A000422` `Adjacent sequences: A104756 A104757 A104758 this_sequence A104760 A104761 A104762`
	KEYWORD	`easy,nonn,base`
	AUTHOR	`Alexandre Wajnberg & Juliette Bruyndonckx (alexandre.wajnberg(AT)ulb.ac.be), Apr 23 2005`

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

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