This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A165740 Positive integers n such that solution to the toric n X n "Lights Out" puzzle is not unique (up to the order of flippings; each flipping appears at most once). 3
 3, 5, 6, 9, 10, 12, 15, 17, 18, 20, 21, 24, 25, 27, 30, 31, 33, 34, 35, 36, 39, 40, 42, 45, 48, 50, 51, 54, 55, 57, 60, 62, 63, 65, 66, 68, 69, 70, 72, 75, 78, 80, 81, 84, 85, 87, 90, 93, 95, 96, 99, 100, 102, 105, 108, 110, 111, 114, 115, 117, 119, 120, 123, 124, 125, 126 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Complement to the sequence A165741 in the set of positive integers. Any positive multiple of a member of this sequence is also a member. Primitive elements are in A007802. - Thomas Buchholz, May 23 2014 REFERENCES See A165738 for the references. LINKS Max Alekseyev and Thomas Buchholz, Table of n, a(n) for n = 1..1000 [terms 67 through 1000 were computed by Thomas Buchholz, May 20 2014] FORMULA A number n is in this sequence iff A165738(n) > 0. CROSSREFS Cf. A159257, A075462, A117870, A165741, A007802, A165738. Sequence in context: A239064 A227455 A237417 * A241571 A080307 A001969 Adjacent sequences:  A165737 A165738 A165739 * A165741 A165742 A165743 KEYWORD nonn AUTHOR Max Alekseyev, Sep 25 2009 EXTENSIONS More terms from Thomas Buchholz, May 20 2014 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.

Last modified August 20 10:05 EDT 2019. Contains 326149 sequences. (Running on oeis4.)