login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A138597 Odd numbers n such that Hamming weight of n equals Hamming weight of n^3. 0
1, 56953, 1830651, 5502457, 130002327, 2941876987, 3479043677, 3674103727, 10601496029, 12739098539, 29928193915, 93415397243, 111392161401, 532403822507, 893286088059, 1039374483323 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This sequence is A118655 without the trivial examples k*2^n.

The first three numbers such that Hamming weight (n) is greater than Hamming weight (n^3) are 407182835067, 445317119867 and 478351981947.

a(17) > 2^40. - Donovan Johnson, May 05 2012

LINKS

Table of n, a(n) for n=1..16.

FORMULA

A000120(a(n)) = A000120(a(n)^3) with a(n) odd

CROSSREFS

Cf. A118655.

Sequence in context: A145685 A333951 A292788 * A206758 A019290 A069335

Adjacent sequences:  A138594 A138595 A138596 * A138598 A138599 A138600

KEYWORD

nonn,base

AUTHOR

Martin Raab, May 13 2008

EXTENSIONS

a(14)-a(16) from Donovan Johnson, May 05 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 28 10:51 EDT 2021. Contains 346326 sequences. (Running on oeis4.)