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A173409
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The number of imperfect staircase polygons counted by diagonal length (also the distance of the terminal vertex from the origin).
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0
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1, 7, 41, 233, 1357, 8382, 56241, 414991, 3365633, 29693227, 280911761, 2810638235, 29409100985, 319090781677, 3567590180489, 40909656141553, 479411305471567, 5725306905205953, 69520621479362969, 856734086346408633
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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3,2
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COMMENTS
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The generating function is the solution of a Fuchsian ODE of order 14.
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Iwan Jensen (I.Jensen(AT)ms.unimelb.edu.au), Feb 17 2010
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STATUS
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approved
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