A045063 Numbers whose base-4 representation contains no 0's and exactly two 3's.

15, 31, 47, 55, 59, 61, 62, 95, 111, 119, 123, 125, 126, 159, 175, 183, 187, 189, 190, 215, 219, 221, 222, 231, 235, 237, 238, 245, 246, 249, 250, 351, 367, 375, 379, 381, 382, 415, 431, 439, 443, 445, 446, 471, 475, 477, 478

Offset

1,1

Links

Table of n, a(n) for n=1..47.

Mathematica

Select[Range[500], DigitCount[#, 4, 0]==0&&DigitCount[#, 4, 3]==2&] (* Harvey P. Dale, Oct 05 2021 *)

Crossrefs

Cf. A007090.

Sequence in context: A043346 A023719 A031467 * A044076 A319282 A125169

Adjacent sequences: A045060 A045061 A045062 * A045064 A045065 A045066

Keyword

nonn,base

Author

Clark Kimberling

Status

approved