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

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A104696 Rearrangement of positive integers: change odd digits d to 10-d. 5
 9, 2, 7, 4, 5, 6, 3, 8, 1, 90, 99, 92, 97, 94, 95, 96, 93, 98, 91, 20, 29, 22, 27, 24, 25, 26, 23, 28, 21, 70, 79, 72, 77, 74, 75, 76, 73, 78, 71, 40, 49, 42, 47, 44, 45, 46, 43, 48, 41, 50, 59, 52, 57, 54, 55, 56, 53, 58, 51, 60, 69, 62, 67, 64, 65, 66, 63, 68, 61, 30, 39, 32 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Any number not containing digits 1, 3, 7, 9 is a fixed point (A104704) and the mapping is its own inverse. - Michael S. Branicky, Sep 02 2021 LINKS Michael S. Branicky, Table of n, a(n) for n = 1..10000 EXAMPLE a(1) = 10 - 1 = 9, a(37) = 73, a(85) = 85. MATHEMATICA Table[FromDigits[If[EvenQ[#], #, 10-#]&/@IntegerDigits[n]], {n, 80}] (* Harvey P. Dale, Sep 27 2018 *) PROG (Python) def f(d): return 10 - d if d%2 == 1 else d def a(n): return int("".join(str(f(int(d))) for d in str(n))) print([a(n) for n in range(1, 73)]) # Michael S. Branicky, Sep 02 2021 (PARI) a(n) = my(d=digits(n)); fromdigits(apply(x->if (x%2, 10-x, x), d)); \\ Michel Marcus, Sep 02 2021 CROSSREFS Cf. A104697, A104702, A104703, A104704 (fixed points). Sequence in context: A010537 A234371 A172423 * A086088 A231986 A347329 Adjacent sequences: A104693 A104694 A104695 * A104697 A104698 A104699 KEYWORD easy,nonn,base AUTHOR Zak Seidov, Mar 18 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.

Last modified December 6 07:59 EST 2022. Contains 358605 sequences. (Running on oeis4.)