A056965 - OEIS

A056965

a(n) = n - (reversal of digits of n).

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

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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) = 2*n - A056964(n).

EXAMPLE

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