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A227205 Number of cyclic-classes of N^k M H V Yangian-invariant functions nontrivially involving n particles. 0
1, 14, 1041, 127776 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

From Table 3, p.93 of Arkani-Hamed.

LINKS

Table of n, a(n) for n=1..4.

Nima Arkani-Hamed, Jacob L. Bourjaily, Freddy Cachazo, Alexander B. Goncharov, Alexander Postnikov, Jaroslav Trnka, Scattering Amplitudes and the Positive Grassmannian, arXiv:1212.5605v1 [hep-th], Dec 21, 2002.

Natalie Wolchover, "A Jewel at the Heart of Quantum Physics", Quanta Magazine, Sep 17, 2013

CROSSREFS

Sequence in context: A208318 A263217 A208388 * A297766 A160011 A104226

Adjacent sequences:  A227202 A227203 A227204 * A227206 A227207 A227208

KEYWORD

nonn,hard,more

AUTHOR

Jonathan Vos Post, Sep 18 2013

STATUS

approved

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Last modified November 22 03:43 EST 2019. Contains 329388 sequences. (Running on oeis4.)