A151947 - OEIS

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A151947

a(1) = 113; thereafter a(n) = (a(n-1) with digits sorted into descending order) - (a(n-1) with digits sorted into ascending order) (see the Kaprekar map, A151949).

4

113, 198, 792, 693, 594, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495, 495

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Converges to the fixed point 495. For the list of fixed points see A099009.

LINKS

Table of n, a(n) for n=1..48.

Index entries for the Kaprekar map

CROSSREFS

Cf. A099009, A151946, A151949, A151955.

Sequence in context: A142180 A325084 A084951 * A087703 A056710 A124585

Adjacent sequences: A151944 A151945 A151946 * A151948 A151949 A151950

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane, Aug 18 2009

STATUS

approved