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%I #20 Nov 29 2019 12:35:59
%S 1,1,2,4,9,23,66,209,718,2645,10373,43090,188803,869191,4189511
%N Arises in patience sorting and its generalizations.
%C Arises from a Neumann series, all of whose nonzero entries are positive integers. The sequence terms and the matrix from which they arise are given explicitly on pages 74-75 of Lankham's Ph.D. dissertation.
%H Elizabeth Hartung, Hung Phuc Hoang, Torsten Mütze, Aaron Williams, <a href="https://arxiv.org/abs/1906.06069">Combinatorial generation via permutation languages. I. Fundamentals</a>, arXiv:1906.06069 [cs.DM], 2019.
%H Isaiah Lankham, <a href="http://arXiv.org/abs/0705.4524">Patience Sorting and Its Generalizations</a>, 31 May 2007, Ph.D. dissertation, 108 pages.
%K nonn,more
%O 1,3
%A _Jonathan Vos Post_, Jun 01 2007
%E Broken URL replaced by _R. J. Mathar_, Jul 10 2009