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A046290 Numbers k such that 2^k contains 2^4=16 as its largest proper substring of the form 2^m (probably finite). 0
14, 24, 40, 44, 62, 64, 70, 75, 81, 84, 98, 99, 114, 117, 122, 127, 133, 134, 140, 159, 167, 175, 184, 188, 189, 190, 200, 212, 215, 232, 234, 273, 274, 282, 292, 300, 318, 348, 377, 440, 516, 527, 620 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..43.

EXAMPLE

2^14 = {16}384;

2^24 = {16}7772{16};

2^40 = 109951{16}27776.

MATHEMATICA

sub2[n_] := Block[{s = ToString[2^n], k = n - 1}, While[k >= 0 && ! StringContainsQ[s, ToString[2^k]], k--]; k]; Select[Range[2000], sub2[#] == 4 &] (* Giovanni Resta, Oct 14 2019 *)

CROSSREFS

Cf. A033921.

Sequence in context: A106699 A111455 A171124 * A111743 A164399 A164404

Adjacent sequences:  A046287 A046288 A046289 * A046291 A046292 A046293

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Jun 15 1998

STATUS

approved

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Last modified December 9 07:21 EST 2021. Contains 349627 sequences. (Running on oeis4.)