A076437 - OEIS

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A076437

Square board sizes for which the lights out problem has a unique solution (counting solutions differing only by rotation and reflection as equivalent).

4

1, 2, 3, 5, 6, 7, 8, 10, 12, 13, 15, 17, 18, 20, 21, 22, 25, 26, 27, 28, 31, 36, 37, 38, 40, 41, 42, 43, 45, 46, 48, 51, 52, 53, 55, 56, 57, 58, 60, 63, 66, 68, 70, 72, 73, 75, 76, 77, 78, 80

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..50.

Marlow Anderson and Todd Feil, Turning Lights Out with Linear Algebra, Math. Mag. 71 (1998), 300-303.

Peter Francis, Algebra in the Game Lights Out, 2026. See p. 4 (Prop. 2).

Eric Weisstein's World of Mathematics, Lights Out Puzzle.

CROSSREFS

Cf. A075463, A076436.

Sequence in context: A145353 A013936 A229992 * A028790 A028748 A028783

Adjacent sequences: A076434 A076435 A076436 * A076438 A076439 A076440

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Oct 11 2002

EXTENSIONS

More terms from Zhao Hui Du, Mar 29 2014

STATUS

approved