A109846 Absolute difference between n and its 9's complement.

9, 7, 5, 3, 1, 1, 3, 5, 7, 9, 79, 77, 75, 73, 71, 69, 67, 65, 63, 61, 59, 57, 55, 53, 51, 49, 47, 45, 43, 41, 39, 37, 35, 33, 31, 29, 27, 25, 23, 21, 19, 17, 15, 13, 11, 9, 7, 5, 3, 1, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53

Offset

0,1

Links

Table of n, a(n) for n=0..76.

Mathematica

a[n_]:=Abs[n-(10^IntegerLength[n]-1-n)]; Join[{9}, Array[a, 76]] (* Stefano Spezia, Nov 30 2023 *)

Crossrefs

Sequence in context: A232735 A191760 A237841 * A096230 A114433 A222129

Adjacent sequences: A109843 A109844 A109845 * A109847 A109848 A109849

Keyword

base,easy,nonn

Author

Amarnath Murthy, Jul 06 2005

Extensions

More terms from Joshua Zucker, May 03 2006

Offset changed by Georg Fischer, Nov 30 2023

Status

approved