A110727 Absolute({n concatenate R(n)}-{R(n) concatenate n})/11, where R(n) = digit reversal of n.

81, 0, 81, 162, 243, 324, 405, 486, 567, 648, 162, 81, 0, 81, 162, 243, 324, 405, 486, 567, 243, 162, 81, 0, 81, 162, 243, 324, 405, 486, 324, 243, 162, 81, 0, 81, 162, 243, 324, 405, 405, 324, 243, 162, 81, 0, 81, 162, 243, 324, 486, 405, 324, 243, 162, 81

Offset

10,1

Comments

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

Links

G. C. Greubel, Table of n, a(n) for n = 10..1000

Formula

When n has two digits a(n)= 81*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)/11 = 81.

Mathematica

Abs[Table[(FromDigits[Join[IntegerDigits[n], Reverse[IntegerDigits[n]]]] - FromDigits[Join[Reverse[IntegerDigits[n]], IntegerDigits[n]]])/11, {n, 10, 60}]] (* G. C. Greubel, Sep 06 2017 *)

Crossrefs

Cf. A110722, A110723, A110724, A110725, A110726.

Sequence in context: A056669 A005085 A050455 * A005068 A366458 A259687

Adjacent sequences: A110724 A110725 A110726 * A110728 A110729 A110730

Keyword

base,easy,nonn

Author

Amarnath Murthy, Aug 09 2005

Status

approved