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”).
%I #14 Sep 19 2017 07:46:57
%S 1,6,30,150,870,5910,46230,409110,4037910,43954710,522956310,
%T 6749977110,93928268310,1401602636310,22324392524310,378011820620310,
%U 6780385526348310
%N T(n,n-2), array T as in A054115.
%H Jan Kneissler, <a href="https://arxiv.org/abs/q-alg/9706022">The number of primitive Vassiliev invariants of degree up to 12</a>, arXiv:q-alg/9706022, 1997; Section 6.1.
%F Conjecture: a(n) -(n+1)*a(n-1) +n*a(n-2)=0. - _R. J. Mathar_, Jun 13 2013
%K nonn
%O 2,2
%A _Clark Kimberling_