A066568 a(n) = n - sum of digits of n.

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 63, 63, 63, 63, 63, 63

Offset: 0

Author

Amarnath Murthy, Dec 18 2001

Keywords

• base
• nonn

Comments

The sum of the digits of any term of this sequence (A066568) is divisible by 9. - Alexandre Wajnberg, Sep 30 2004

Examples

			a(23) = 23 - 2 - 3 = 18, a(2345) = 2345 - 2 - 3 - 4 - 5 = 2331.
		

Links

• Harry J. Smith, Table of n, a(n) for n = 0..1000
• Index entries for Colombian or self numbers and related sequences

Crossrefs

Cf. A060028. - Reinhard Zumkeller, Mar 31 2010

Cf. A066568.

Programs

Magma

[n -(&+Intseq(n)): n in [1..100]]; // Vincenzo Librandi, Jan 04 2016

Mathematica

Table[n-Total[IntegerDigits[n]],{n,0,80}] (* Harvey P. Dale, Sep 19 2011 *)

PARI

a(n) = n - sumdigits(n); \\ Michel Marcus, Jan 04 2016

Extensions

More terms from Larry Reeves (larryr(AT)acm.org), Dec 21 2001