A045039 Numbers whose base-4 representation contains no 0's and exactly two 2's.

10, 26, 38, 41, 43, 46, 58, 90, 102, 105, 107, 110, 122, 150, 153, 155, 158, 165, 167, 173, 175, 182, 185, 187, 190, 218, 230, 233, 235, 238, 250, 346, 358, 361, 363, 366, 378, 406, 409, 411, 414, 421, 423, 429, 431, 438, 441

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..5000

Mathematica

Select[Range[20000], DigitCount[#, 4, 0] == 0 && DigitCount[#, 4, 2] == 2 &] (* Vincenzo Librandi, Sep 23 2016 *)

Crossrefs

Cf. A007090.

Sequence in context: A369668 A262998 A245021 * A322972 A080059 A071348

Adjacent sequences: A045036 A045037 A045038 * A045040 A045041 A045042

Keyword

nonn,base

Author

Clark Kimberling

Status

approved