A045064 Numbers whose base-4 representation contains no 0's and exactly three 3's.

63, 127, 191, 223, 239, 247, 251, 253, 254, 383, 447, 479, 495, 503, 507, 509, 510, 639, 703, 735, 751, 759, 763, 765, 766, 863, 879, 887, 891, 893, 894, 927, 943, 951, 955, 957, 958, 983, 987, 989, 990, 999, 1003, 1005, 1006, 1013

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..2500

Mathematica

Select[Range[7000], DigitCount[#, 4, 0] == 0 && DigitCount[#, 4, 3] == 3 &] (* Vincenzo Librandi, Sep 21 2016 *)

Crossrefs

Different from A031468.

Cf. A007090.

Sequence in context: A080947 A023720 A031468 * A043450 A031491 A044250

Adjacent sequences: A045061 A045062 A045063 * A045065 A045066 A045067

Keyword

nonn,base

Author

Clark Kimberling

Status

approved