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%I
%S 1,1,2,9,52,364,2918,26138
%N Dimensions of the Sylvester subalgebra of the Hopf algebra PML_1.
%H H. Cheballah, S. Giraudo, R. Maurice, <a href="http://arxiv.org/abs/1306.6605">Combinatorial Hopf algebra structure on packed square matrices</a>, arXiv preprint arXiv:1306.6605, 2013
%K nonn,more
%O 0,3
%A _N. J. A. Sloane_, Nov 09 2013
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