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A074204 Numbers n such that the number of 1's in the binary representation of n divides 2^n+1. 0
1, 2, 4, 7, 8, 11, 13, 16, 19, 21, 25, 32, 35, 37, 41, 49, 62, 64, 67, 69, 73, 81, 94, 97, 110, 118, 122, 128, 131, 133, 137, 145, 158, 161, 174, 182, 186, 193, 206, 214, 218, 230, 234, 242, 256, 259, 261, 265, 273, 286, 289, 302, 310, 314, 321, 334, 342, 346 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..58.

MATHEMATICA

Select[Range[350], Divisible[2^#+1, DigitCount[#, 2, 1]]&]  (* Harvey P. Dale, Feb 19 2011 *)

PROG

(PARI) isok(n) = !((2^n+1) % hammingweight(n)); \\ Michel Marcus, Nov 29 2013

CROSSREFS

Sequence in context: A187834 A261619 A187575 * A030355 A080704 A244779

Adjacent sequences:  A074201 A074202 A074203 * A074205 A074206 A074207

KEYWORD

base,easy,nonn

AUTHOR

Benoit Cloitre, Sep 17 2002

STATUS

approved

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Last modified December 6 06:58 EST 2016. Contains 278775 sequences.