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A099247 Numbers such that, in binary representation, the length and the number of ones are coprime. 4
1, 2, 4, 5, 6, 8, 11, 13, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32, 47, 55, 59, 61, 62, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A099244(a(n)) = 1; complement of A099248.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Index entries for sequences related to binary expansion of n

MATHEMATICA

Select[Range[150], CoprimeQ[IntegerLength[#, 2], DigitCount[#, 2, 1]]&] (* Harvey P. Dale, Sep 22 2012 *)

PROG

(Haskell)

a099247 n = a099247_list !! (n-1)

a099247_list = filter ((== 1) . a099244) [1..]

-- Reinhard Zumkeller, Oct 10 2013

CROSSREFS

Cf. A099249, A070939, A000120, A007088.

Sequence in context: A082851 A091207 A284525 * A192583 A240064 A007192

Adjacent sequences:  A099244 A099245 A099246 * A099248 A099249 A099250

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Oct 08 2004

EXTENSIONS

Definition clarified by Harvey P. Dale, Sep 22 2012

STATUS

approved

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Last modified February 21 19:26 EST 2018. Contains 299422 sequences. (Running on oeis4.)