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A173409 The number of imperfect staircase polygons counted by diagonal length (also the distance of the terminal vertex from the origin). 0

%I

%S 1,7,41,233,1357,8382,56241,414991,3365633,29693227,280911761,

%T 2810638235,29409100985,319090781677,3567590180489,40909656141553,

%U 479411305471567,5725306905205953,69520621479362969,856734086346408633

%N The number of imperfect staircase polygons counted by diagonal length (also the distance of the terminal vertex from the origin).

%C The generating function is the solution of a Fuchsian ODE of order 14.

%K nonn

%O 3,2

%A Iwan Jensen (I.Jensen(AT)ms.unimelb.edu.au), Feb 17 2010

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Last modified September 29 18:39 EDT 2022. Contains 357090 sequences. (Running on oeis4.)