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, 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

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: A089133 A103149 A372012 * 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