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

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 * A343363 A331706 A074429

Adjacent sequences: A283325 A283326 A283327 * A283329 A283330 A283331

Keyword

nonn,more

Author

N. J. A. Sloane, Mar 17 2017

Status

approved