A283328 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A283328

Number of compatible Parke-Taylor factors for the graph obtained by combining one triangle with a regular n-gon.

6, 42, 264, 1920, 16284, 154098, 1607296

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,1

LINKS

Table of n, a(n) for n=2..8.

Freddy Cachazo, Humberto Gomez, Computation of Contour Integrals on M_{0,n}, arXiv preprint, 2015. Also JHEP, 2016; doi:10.1007/JHEP04(2016)108. See Table 1.

CROSSREFS

Sequence in context: A246938 A158797 A218060 * A377194 A343363 A331706

Adjacent sequences: A283325 A283326 A283327 * A283329 A283330 A283331

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Mar 17 2017

STATUS

approved