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A039280 Numbers n such that representation in base 4 has same nonzero number of 1's and 2's. 0
6, 9, 18, 24, 27, 30, 33, 36, 39, 45, 54, 57, 66, 72, 75, 78, 90, 96, 99, 102, 105, 108, 111, 114, 120, 123, 126, 129, 132, 135, 141, 144, 147, 150, 153, 156, 159, 165, 177, 180, 183, 189, 198, 201, 210, 216, 219, 222, 225, 228, 231, 237, 246, 249, 258, 264 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..56.

MATHEMATICA

Select[Range[300], DigitCount[#, 4, 1]==DigitCount[#, 4, 2]>0&] (* Harvey P. Dale, Jan 23 2012 *)

CROSSREFS

Sequence in context: A020183 A320492 A316071 * A045091 A086955 A270794

Adjacent sequences:  A039277 A039278 A039279 * A039281 A039282 A039283

KEYWORD

nonn,base,easy

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified June 21 19:59 EDT 2021. Contains 345365 sequences. (Running on oeis4.)