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A004643 Powers of 2 written in base 4. 0
1, 2, 10, 20, 100, 200, 1000, 2000, 10000, 20000, 100000, 200000, 1000000, 2000000, 10000000, 20000000, 100000000, 200000000, 1000000000, 2000000000, 10000000000, 20000000000, 100000000000, 200000000000 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Sequence in context: A090220 A164882 A029994 * A156818 A037422 A136735

Adjacent sequences:  A004640 A004641 A004642 * A004644 A004645 A004646

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified February 14 15:39 EST 2012. Contains 205635 sequences.