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.

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

Author

Paolo P. Lava and Giorgio Balzarotti, Mar 15 2010

Keywords

• easy
• nonn
• base

Examples

			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

Cf. A030190, A174203-A174207, A174209, A174210.

Extensions

Edited by N. J. A. Sloane, Aug 21 2012