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A056965 n -> n - reversal of digits of n. 21
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, -9, -18, -27, -36, -45, -54, -63, -72, 18, 9, 0, -9, -18, -27, -36, -45, -54, -63, 27, 18, 9, 0, -9, -18, -27, -36, -45, -54, 36, 27, 18, 9, 0, -9, -18, -27, -36, -45, 45, 36, 27, 18, 9, 0, -9, -18, -27, -36, 54, 45, 36, 27, 18, 9, 0, -9, -18, -27, 63, 54, 45, 36, 27, 18, 9, 0, -9, -18, 72, 63, 54 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,11

COMMENTS

a(n) is a multiple of 9.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Index entries for the Kaprekar map

FORMULA

a(n) = n - A004086(n) = 2n - A056964(n).

EXAMPLE

a(17) = 17 - 71 = -54.

MATHEMATICA

Table[n - FromDigits[Reverse[IntegerDigits[n]]], {n, 0, 82}] (* Jayanta Basu, Jul 11 2013 *)

PROG

(Haskell)

a056965 n = n - a004086 n  -- Reinhard Zumkeller, Sep 17 2013

CROSSREFS

Cf. A004086, A056964, A068396, A151949, A265326.

Sequence in context: A197264 A273086 A151949 * A062047 A117465 A136679

Adjacent sequences:  A056962 A056963 A056964 * A056966 A056967 A056968

KEYWORD

base,sign,look

AUTHOR

Henry Bottomley, Jul 18 2000

STATUS

approved

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Last modified September 25 18:20 EDT 2017. Contains 292499 sequences.