A228723 - OEIS

A228723

Smallest number not less than n with alternating parities of digits in decimal representation.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 12, 14, 14, 16, 16, 18, 18, 21, 21, 21, 23, 23, 25, 25, 27, 27, 29, 29, 30, 32, 32, 34, 34, 36, 36, 38, 38, 41, 41, 41, 43, 43, 45, 45, 47, 47, 49, 49, 50, 52, 52, 54, 54, 56, 56, 58, 58, 61, 61, 61, 63, 63, 65, 65, 67

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

COMMENTS

A228722(n) <= n <= a(n) and A228710(a(n)) = 1;

a(A030141(n)) = A030141(n); a(A228709(n)) > A228709(n).

lim sup a(n)/n = 2080/1881. - Charles R Greathouse IV, Sep 12 2013

LINKS

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

EXAMPLE

a(100) = 101; a(1000) = 1010; a(10000) = 10101; a(100000) = 101010;

a(101) = 101; a(1001) = 1010.