A110726 - OEIS

A110726

Absolute({n concatenate R(n)}-{ R(n) concatenate n}), R(n) = digit reversal of n.

891, 0, 891, 1782, 2673, 3564, 4455, 5346, 6237, 7128, 1782, 891, 0, 891, 1782, 2673, 3564, 4455, 5346, 6237, 2673, 1782, 891, 0, 891, 1782, 2673, 3564, 4455, 5346, 3564, 2673, 1782, 891, 0, 891, 1782, 2673, 3564, 4455, 4455, 3564, 2673, 1782, 891, 0, 891

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

OFFSET

10,1

COMMENTS

a(palindrome ) = 0. a(n) = a(R(n)).

When concatenating the reversal after n the leading zeros are not dropped. - Tanya Khovanova, Jun 28 2021

LINKS

G. C. Greubel, Table of n, a(n) for n = 10..999

FORMULA

When n has two digits a(n)= 891*ABS(x-y), (Here x,y are the digits of n and ABS(n) is the absolute value of n.). - Keith Schneider, Jun 16 2007

EXAMPLE

a(12) = ABS(1221-2112) = 891.

a(10) = ABS(1001-110) = 891. - Tanya Khovanova, Jun 28 2021

MATHEMATICA

Abs[Table[FromDigits[Join[IntegerDigits[n], Reverse[IntegerDigits[n]]]] - FromDigits[Join[Reverse[IntegerDigits[n]], IntegerDigits[n]]], {n, 10, 60}]] (* G. C. Greubel, Sep 06 2017 *)

CROSSREFS

Cf. A004086, A110722, A110723, A110724, A110725, A110727.

Sequence in context: A202528 A006916 A128871 * A204366 A266915 A124666

Adjacent sequences: A110723 A110724 A110725 * A110727 A110728 A110729

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Aug 09 2005

EXTENSIONS

More terms from Sean A. Irvine, Feb 14 2011

STATUS

approved