%I #9 Mar 03 2022 13:18:46
%S 6,17,33,63,109,178,277
%N Number of unspecified amplitude coefficients in an n-particle supersymmetric Yang-Mills Lagrangian (with maximum helicity violation, 4 charges) on the three-loop level.
%C Taken from Table 2 of Golden and Spradin. The terms contributing to the three-loop basis are symmetrized over the allowed planar diagrams, but no constraint related to removal of UV divergencies has yet been added to fix some of the coefficients.
%H N. Arkani-Hamed, J. Bourjaily, F. Cachazo, and J. Trnka, <a href="http://arxiv.org/abs/1012.6032">Local integrals for planar scattering amplitudes</a>, arXiv:1012.6032 [hep-th], 2010.
%H J. Golden and M. Spradin, <a href="http://arxiv.org/abs/1203.1915">Collinear and soft limits of multi-loop integrands in N=4 Yang-Mills</a>, arXiv:1203.1915 [hep-th], 2012, Table 2.
%Y Cf. A006918 (Table 1).
%K nonn,more
%O 5,1
%A _R. J. Mathar_, Sep 19 2012