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!)
A007802 Numbers n such that game of n X n Button Madness need have no solution; this lists only the primitive elements of the set. 3
3, 5, 17, 31, 127, 257, 511, 683, 2047, 2731, 3277, 3641, 8191, 43691, 52429, 61681, 65537, 85489, 131071, 174763, 178481, 233017, 253241, 256999, 486737, 524287, 704093, 838861, 1016801, 1082401, 1657009, 1838599, 1965379, 2304167, 2796203, 3033169, 3303821 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primitive elements of A165740. - Thomas Buchholz, May 23 2014

Andries E. Brouwer remarks that it can be shown that this sequence is infinite and contains A000668 > 7 and A019434. - Thomas Buchholz, May 23 2014

LINKS

N. J. A. Sloane, Table of n, a(n) for n = 1..42 [Copied from Brouwer's MAD numbers web page]

Andries E. Brouwer, MAD numbers

CROSSREFS

Cf. A000668, A019434, A165740.

Sequence in context: A297175 A089133 A103149 * A056816 A156761 A151261

Adjacent sequences:  A007799 A007800 A007801 * A007803 A007804 A007805

KEYWORD

nonn

AUTHOR

Aart Blokhuis (aartb(AT)win.tue.nl), Mar 15 1996

EXTENSIONS

More terms from Andries E. Brouwer, May 31 2002, Sep 10 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 August 13 08:34 EDT 2020. Contains 336442 sequences. (Running on oeis4.)