A037409 Positive numbers having the same set of digits in base 2 and base 4.

1, 4, 16, 17, 20, 64, 65, 68, 69, 80, 81, 84, 256, 257, 260, 261, 272, 273, 276, 277, 320, 321, 324, 325, 336, 337, 340, 1024, 1025, 1028, 1029, 1040, 1041, 1044, 1045, 1088, 1089, 1092, 1093, 1104, 1105, 1108, 1109, 1280, 1281

Offset

1,2

Links

John Cerkan, Table of n, a(n) for n = 1..10000

Mathematica

Select[Range[1500], Union[IntegerDigits[#, 2]]==Union[IntegerDigits[#, 4]]&] (* Harvey P. Dale, Sep 14 2014 *)

Crossrefs

Subsequence of A000695.

Sequence in context: A140299 A119007 A043052 * A178364 A034121 A281685

Adjacent sequences: A037406 A037407 A037408 * A037410 A037411 A037412

Keyword

nonn,base

Author

Clark Kimberling

Status

approved