A045021 Numbers whose base-4 representation contains exactly one 0 and three 1's.

69, 81, 84, 278, 279, 281, 285, 293, 309, 326, 327, 329, 333, 338, 339, 344, 348, 353, 356, 369, 372, 389, 401, 404, 453, 465, 468, 533, 581, 593, 596, 789, 837, 849, 852, 1114, 1115, 1118, 1119, 1126, 1127, 1129, 1133, 1142

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..9000

Mathematica

Select[Range[10000], DigitCount[#, 4, 0] == 1 && DigitCount[#, 4, 1] == 3 &] (* Vincenzo Librandi, Sep 21 2016 *)

Crossrefs

Cf. A007090.

Sequence in context: A235226 A015980 A065209 * A254712 A197172 A253154

Adjacent sequences: A045018 A045019 A045020 * A045022 A045023 A045024

Keyword

nonn,base

Author

Clark Kimberling

Status

approved