Dimensions of the Sylvester subalgebra of the Hopf algebra PMN_1.

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%S 1,1,7,221,24243

%N Dimensions of the Sylvester subalgebra of the Hopf algebra PMN_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