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A037409 Positive numbers having the same set of digits in base 2 and base 4. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified July 24 14:39 EDT 2021. Contains 346273 sequences. (Running on oeis4.)