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A174208
Write natural numbers in base 2 as a stream of digits. Moving left to right, delete odd occurrences of digit 0 and even occurrences of digit 1.
3
1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1
OFFSET
0,1
EXAMPLE
Numbers in base 2: 0, 1, 10, 11, 100, 101, 110, 111, 1000.....
Stream of digits: 0110111001011101111000...
Delete odd occurrences of 0 (replace by ~): ~110111~01~11101111~0~...
Delete even occurrences of 1 (replace by ~): ~1~01~1~0~~1~10~1~1~0~...
This leaves the digits: 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0,....
CROSSREFS
KEYWORD
easy,nonn,base
AUTHOR
EXTENSIONS
Edited by N. J. A. Sloane, Aug 21 2012
STATUS
approved