A165740 -id:A165740 - cp's OEIS frontend

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

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

nonn

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

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

Cf. A000668, A019434, A165740.

More terms from Andries E. Brouwer, May 31 2002, Sep 10 2012

A165741 Positive integers n such that the toric n X n "Lights Out" puzzle has a unique solution (up to the order of flippings; each flipping appears at most once).

Original entry on oeis.org

1, 2, 4, 7, 8, 11, 13, 14, 16, 19, 22, 23, 26, 28, 29, 32, 37, 38, 41, 43, 44, 46, 47, 49, 52, 53, 56, 58, 59, 61, 64, 67, 71, 73, 74, 76, 77, 79, 82, 83, 86, 88, 89, 91, 92, 94, 97, 98, 101, 103, 104, 106, 107, 109, 112, 113, 116, 118, 121, 122, 128, 131, 133, 134, 137

Offset: 1

Max Alekseyev, Sep 25 2009

nonn

Complement to the sequence A165740 in the set of positive integers.

See A165738 for the references.

Max Alekseyev and Thomas Buchholz, Table of n, a(n) for n = 1..1000 [terms 66 through 1000 were computed by Thomas Buchholz, May 20 2014]

Cf. A159257, A075462, A076436, A165740.

n is in this sequence iff A165738(n)=0.

More terms from Thomas Buchholz, May 20 2014

cp's OEIS Frontend

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.

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