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A103181 In decimal representation of n: replace all even digits by 0 and all odd digits by 1. +0
1
0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 10, 11, 10, 11, 10, 11, 10, 11, 10, 11, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 10, 11, 10, 11, 10, 11, 10, 11, 10, 11, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 10, 11, 10, 11, 10, 11, 10, 11, 10, 11, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 10, 11, 10, 11, 10, 11, 10, 11, 10, 11, 0, 1, 0, 1, 0, 1 (list; graph; listen)
OFFSET

0,11

FORMULA

n=Sum(d(k)*10^k: 0<=d(k)<10) -> a(n)=Sum((d(k) mod 2)*10^k).

EXAMPLE

199->'111': a(199)=111; 200->'000': a(200)=0;

299->'011': a(299)=11; 300->'100': a(300)=100.

CROSSREFS

Cf. A000035.

Adjacent sequences: A103178 A103179 A103180 this_sequence A103182 A103183 A103184

Sequence in context: A004451 A004499 A020509 this_sequence A100813 A085209 A085217

KEYWORD

nonn,base

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 18 2005

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.


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