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A108971 Lexicographically earliest sequence such that in decimal representation sums of digits of consecutive terms differ exactly by 1 or -1. 8
1, 2, 3, 4, 5, 6, 7, 8, 9, 17, 16, 15, 14, 13, 12, 11, 10, 20, 21, 22, 23, 24, 25, 26, 18, 19, 27, 28, 29, 37, 36, 35, 34, 33, 32, 31, 30, 40, 41, 42, 43, 44, 45, 46, 38, 39, 47, 48, 49, 57, 56, 55, 54, 53, 52, 51, 50, 60, 61, 62, 63, 64, 65, 66, 58, 59, 67, 68, 69, 77, 76, 75 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Permutation of the natural numbers with inverse A179977; A179978(n)=a(a(n)); A179979 gives fixed points: a(A179979(n))=A179979(n).

abs(A007953(a(n+1)) - A007953(a(n))) = 1.

A179987(n)=A007953(a(n)); A007953(a(A179988(n)))=n; a(A179988(n))=A051885(n+1). - Reinhard Zumkeller, Aug 09 2010, Jul 10 2011

LINKS

R. Zumkeller, Table of n, a(n) for n = 1..10000

Index entries for sequences that are permutations of the natural numbers

CROSSREFS

Sequence in context: A048407 A322260 A133504 * A179977 A124359 A124366

Adjacent sequences:  A108968 A108969 A108970 * A108972 A108973 A108974

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller, Jul 27 2005

EXTENSIONS

Comment corrected and extended by Reinhard Zumkeller, Aug 04 2010

STATUS

approved

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Last modified January 18 16:40 EST 2019. Contains 319271 sequences. (Running on oeis4.)