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A208357
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Number of meanders of order 2n+1 (4*n+2 crossings of the infinite line) with central 1-1 cut.
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0
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OFFSET
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1,1
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REFERENCES
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A. Panayotopoulos and P. Tsikouras, Properties of meanders, JCMCC 46 (2003), 181-190.
A. Panayotopoulos and P. Vlamos, Meandric Polygons, Ars Combinatoria 87 (2008), 147-159.
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LINKS
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A. Panayotopoulos and P. Vlamos, Cutting Degree of Meanders, Artificial Intelligence Applications and Innovations, IFIP Advances in Information and Communication Technology, Volume 382, 2012, pp 480-489; DOI 10.1007/978-3-642-33412-2_49. - From N. J. A. Sloane, Dec 29 2012
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FORMULA
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a(n) = b(n)^2 where b(n) = A005315 (with a different offset).
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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