id:A162501 - OEIS Search Results

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Lexicographically smallest permutation of the natural numbers such that in decimal representation the initial digit for each term is equal to the last non-zero digit of its predecessor; a(1)=1.

+0
4

1, 10, 11, 12, 2, 20, 21, 13, 3, 30, 31, 14, 4, 40, 41, 15, 5, 50, 51, 16, 6, 60, 61, 17, 7, 70, 71, 18, 8, 80, 81, 19, 9, 90, 91, 100, 101, 102, 22, 23, 32, 24, 42, 25, 52, 26, 62, 27, 72, 28, 82, 29, 92, 200, 201, 103, 33, 34, 43, 35, 53, 36, 63, 37, 73, 38, 83, 39, 93, 300, 301 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`A000030(a(n+1)) = A065881(a(n));` `inverse of A162502: a(A162502(n)) = A162502(a(n)) = n;` `a(a(n)) = A162503(n).`
	LINKS	`R. Zumkeller, Table of n, a(n) for n = 1..1000` `Index entries for sequences that are permutations of the natural numbers`
	CROSSREFS	`A076654, A130571.` `Sequence in context: A108787 A097585 A063671 this_sequence A123895 A147519 A100830` `Adjacent sequences: A162498 A162499 A162500 this_sequence A162502 A162503 A162504`
	KEYWORD	`base,nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 05 2009`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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