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David Bevan, Open Meanders [From David Bevan, Jun 25 2010]
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I. Jensen, Enumeration of plane meanders
I. Jensen, First 43 terms
M. La Croix, Approaches to the Enumerative Theory of Meanders [From Gerald McGarvey, Oct 26 2008]
A. Phillips, Mazes
A. Phillips, Simple, Alternating, Transit Mazes
N. J. A. Sloane, Illustration of initial terms
N. J. A. Sloane, My favorite integer sequences, in Sequences and their Applications (Proceedings of SETA '98).