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%I #4 Feb 17 2015 20:34:44
%S 1,0,1,1,5,17,90,542,3962,33554,324489,3520885,42300709,556530474,
%T 7945317484,122145525208,2008827010000,35143981009968
%N The dimension of the space of invariant tensors in the n-th tensor power of the adjoint representation of the exceptional Lie algebra E6.
%C This is known to satisfy a linear recurrence relation with polynomial coefficients. The limit of a(n+1)/a(n) is 78.
%e The n-th tensor power is the trivial representation for n=0 and is the adjoint representation for n=1. For n=2 every invariant tensor is a scalar multiple of a Killing form.
%K nonn
%O 0,5
%A _Bruce Westbury_, Jul 24 2010
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