A065031 In the decimal expansion of n, replace each odd digit with 1 and each even digit with 2.

2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 12, 11, 12, 11, 12, 11, 12, 11, 12, 11, 22, 21, 22, 21, 22, 21, 22, 21, 22, 21, 12, 11, 12, 11, 12, 11, 12, 11, 12, 11, 22, 21, 22, 21, 22, 21, 22, 21, 22, 21, 12, 11, 12, 11, 12, 11, 12, 11, 12, 11, 22, 21, 22, 21, 22, 21, 22, 21, 22, 21

Offset

0,1

Comments

A196563(a(n)) = A196563(n); A196564(a(n)) = A196564(n).

Links

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Example

a(123)=121 because 1 and 3 are odd and 2 is even.

Mathematica

Table[FromDigits[If[OddQ[#], 1, 2]&/@IntegerDigits[n]], {n, 0, 120}] (* Harvey P. Dale, Jun 08 2014 *)

Prog

(Haskell)
a065031 n = f n  where
   f x | x < 10    = 2 - x `mod` 2
       | otherwise = 10 * (f x') + 2 - m `mod` 2
       where (x', m) = divMod x 10
-- Reinhard Zumkeller, Feb 22 2012

Crossrefs

Sequence in context: A161301 A161276 A160980 * A305832 A058061 A371090

Adjacent sequences: A065028 A065029 A065030 * A065032 A065033 A065034

Keyword

base,nonn

Author

Santi Spadaro, Nov 03 2001

Status

approved