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A030399 Write n in base 4, then complement each digit (d -> 3-d) and juxtapose. 1
2, 1, 0, 2, 3, 2, 2, 2, 1, 2, 0, 1, 3, 1, 2, 1, 1, 1, 0, 0, 3, 0, 2, 0, 1, 0, 0, 2, 3, 3, 2, 3, 2, 2, 3, 1, 2, 3, 0, 2, 2, 3, 2, 2, 2, 2, 2, 1, 2, 2, 0, 2, 1, 3, 2, 1, 2, 2, 1, 1, 2, 1, 0, 2, 0, 3, 2, 0, 2, 2, 0, 1, 2, 0, 0, 1, 3, 3, 1, 3, 2, 1, 3, 1, 1, 3, 0, 1, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..90.

MATHEMATICA

3 - Flatten[ IntegerDigits[ Range@ 40, 4]] (* Robert G. Wilson v, Jul 01 2014 *)

CROSSREFS

Sequence in context: A325181 A072739 A328699 * A128763 A127597 A167749

Adjacent sequences: A030396 A030397 A030398 * A030400 A030401 A030402

KEYWORD

nonn,base

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified January 30 03:32 EST 2023. Contains 359939 sequences. (Running on oeis4.)