OFFSET
1,2
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
MATHEMATICA
b3rQ[n_]:=Module[{r=Boole[OddQ/@(Length/@Split[IntegerDigits[ n, 3]])]}, r == PadRight[{}, Length[r], {1, 0}]]; Select[Range[500], b3rQ] (* Harvey P. Dale, Jul 17 2020 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved