login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A045033
Numbers whose base-4 representation contains exactly four 0's and no 1's.
1
512, 768, 2050, 2051, 2056, 2060, 2080, 2096, 2176, 2240, 2560, 2816, 3074, 3075, 3080, 3084, 3104, 3120, 3200, 3264, 3584, 3840, 8202, 8203, 8206, 8207, 8226, 8227, 8232, 8236, 8242, 8243, 8248, 8252, 8322, 8323, 8328
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[10000], DigitCount[#, 4, 0] == 4 && DigitCount[#, 4, 1] == 0 &] (* Vincenzo Librandi, Sep 23 2016 *)
CROSSREFS
Cf. A007090.
Sequence in context: A046311 A036333 A046312 * A066648 A043423 A341886
KEYWORD
nonn,base
STATUS
approved