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 A303836 Number of noncrossing path sets on n nodes up to rotation with isolated vertices allowed. 3
 1, 1, 2, 3, 10, 26, 103, 371, 1552, 6475, 28414, 126530, 577188, 2670332, 12538434, 59554199, 285882600, 1384875627, 6763821250, 33276183371, 164789380052, 820923863918, 4111708742153, 20695831549310, 104642143845428, 531295928725508, 2707906874407464 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Andrew Howroyd, Table of n, a(n) for n = 0..200 EXAMPLE Case n=4: There are 10 possibilities: .    o   o    o   o    o   o    o   o    o---o                        /      |    o   o    o---o    o   o    o---o    o---o .    o   o    o   o    o   o    o---o    o---o      /        \      |   |      /        \    o---o    o---o    o---o    o---o    o---o . PROG (PARI) \\ See A303732 for NCPathSetsModCyclic Vec(NCPathSetsModCyclic(vector(30, k, 1))) CROSSREFS Row sums of A303869. Cf. A303732, A303844. Sequence in context: A182926 A005225 A211208 * A238937 A278088 A052929 Adjacent sequences:  A303833 A303834 A303835 * A303837 A303838 A303839 KEYWORD nonn AUTHOR Andrew Howroyd, May 01 2018 STATUS approved

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Last modified May 15 02:21 EDT 2021. Contains 343909 sequences. (Running on oeis4.)