A099247 - OEIS

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A099247

Numbers such that, in binary representation, the length and the number of ones are coprime.

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)