login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A109910 a(n) = 9's complement of digit reversal of n. 2
9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 8, 88, 78, 68, 58, 48, 38, 28, 18, 8, 7, 87, 77, 67, 57, 47, 37, 27, 17, 7, 6, 86, 76, 66, 56, 46, 36, 26, 16, 6, 5, 85, 75, 65, 55, 45, 35, 25, 15, 5, 4, 84, 74, 64, 54, 44, 34, 24, 14, 4, 3, 83, 73, 63, 53, 43, 33, 23, 13, 3, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
FORMULA
a(n) = A061601(A004086(n)). - Indranil Ghosh, Jan 30 2017
EXAMPLE
a(17) = 28. Digit reversal of 17 = 71, 9's complement of 71 is 99-71 = 28.
MAPLE
R := proc(n) local nn, nnn: nn:=convert(n, base, 10): add(nn[nops(nn)+1-j]*10^(j-1), j=1..nops(nn)): end:
A109910 := proc(n) return 10^length(max(R(n), 1)) - R(n) - 1: end:
seq(A109910(n), n=0..70); # Nathaniel Johnston, Apr 28 2011
MATHEMATICA
Table[10^If[# == 0, 1, IntegerLength@ #] - 1 - # &@ FromDigits@ Reverse@ IntegerDigits@ n, {n, 0, 70}] (* Michael De Vlieger, Feb 01 2017 *)
PROG
(Python)
def A109910(n):
....x=int(str(n)[::-1])
....return 10**len(str(x))-1-x # Indranil Ghosh, Jan 30 2017
CROSSREFS
Sequence in context: A199264 A022965 A023451 * A307340 A084019 A061601
KEYWORD
base,easy,nonn,look
AUTHOR
Amarnath Murthy, Jul 16 2005
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 20 18:43 EDT 2024. Contains 374459 sequences. (Running on oeis4.)