A129698 Arises in patience sorting and its generalizations.

1, 1, 2, 4, 9, 23, 66, 209, 718, 2645, 10373, 43090, 188803, 869191, 4189511

Offset

1,3

Comments

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.

Links

Table of n, a(n) for n=1..15.

Elizabeth Hartung, Hung Phuc Hoang, Torsten Mütze, Aaron Williams, Combinatorial generation via permutation languages. I. Fundamentals, arXiv:1906.06069 [cs.DM], 2019.

Isaiah Lankham, Patience Sorting and Its Generalizations, 31 May 2007, Ph.D. dissertation, 108 pages.

Crossrefs

Sequence in context: A202552 A272301 A359032 * A261134 A117419 A124461

Adjacent sequences: A129695 A129696 A129697 * A129699 A129700 A129701

Keyword

nonn,more

Author

Jonathan Vos Post, Jun 01 2007

Extensions

Broken URL replaced by R. J. Mathar, Jul 10 2009

Status

approved