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 A209064 Numbers n whose divisors, when expressed in binary, have lengths 1 to tau(n). 1
 1, 2, 3, 4, 8, 10, 14, 15, 16, 32, 44, 50, 52, 63, 64, 128, 136, 152, 170, 184, 190, 230, 231, 232, 238, 248, 250, 255, 256, 484, 512, 592, 656, 688, 752, 848, 944, 976, 1024, 2048, 2144, 2272, 2312, 2336, 2528, 2656, 2848, 2888, 2890, 2948, 3104, 3124, 3212 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Subsequence of A135772 (numbers having equal number of divisors and binary digits). Supersequence of A000079 (powers of 2). LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 EXAMPLE Divisors of n in base 2 (k-th divisor contains k digits): n=1:   1; n=16:  1, 10, 100, 1000, 10000; n=230: 1, 10, 101, 1010, 10111, 101110, 1110011, 11100110. MATHEMATICA Join[{1}, Select[Range[4000], Union[Differences[Length /@ IntegerDigits[Divisors[#], 2]]] == {1} &]] (* T. D. Noe, Mar 12 2012 *) CROSSREFS Cf. A135772. Sequence in context: A180941 A190896 A135772 * A222264 A051783 A033083 Adjacent sequences:  A209061 A209062 A209063 * A209065 A209066 A209067 KEYWORD nonn,base AUTHOR Jaroslav Krizek, Mar 04 2012 STATUS approved

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Last modified January 22 16:47 EST 2019. Contains 319364 sequences. (Running on oeis4.)