A self-avoiding walk in which steps may be to the left, right, or straight ahead after a vertical step, but only straight ahead or to the left after a horizontal step. A lattice polygon formed by a three-choice walk is called a three-choice polygon.
Three-Choice Walk
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References
Bousquet-Mélou, M.; Guttmann, A. J.; Orrick, W. P.; and Rechnitzer, A. "Inversion Relations, Reciprocity and Polyominoes." 23 Aug 1999. http://arxiv.org/abs/math.CO/9908123.Referenced on Wolfram|Alpha
Three-Choice WalkCite this as:
Weisstein, Eric W. "Three-Choice Walk." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Three-ChoiceWalk.html