%I #27 Jan 31 2017 02:14:23
%S 1,2,15,65,190,447
%N Number of different classes of entangling power of permutation matrices of dimension d^2, acting on a d X d (tensor product) Hilbert space.
%C a(1), a(2) and a(3) were obtained via an exhaustive search; Lower bounds on a(4) through a(10) are 65, 190, 447, 890, 1603, 2675, 4200. - _Lieven Clarisse_, Jan 29 2017
%C I moved a(4)-a(6) back to the data field, even though they have not been proved. If they are deleted the sequence melts away. - _N. J. A. Sloane_, Jan 31 2017
%H Lieven Clarisse, Sibasish Ghosh, Simone Severini and Anthony Sudbery, <a href="http://arXiv.org/abs/quant-ph/0502040">Entangling Power of Permutations</a>, Phys. Rev. A 72, 012314 (2005).
%K nonn,bref,hard,more
%O 1,2
%A _Lieven Clarisse_ and _Simone Severini_, Apr 25 2006
%E Moved terms a(4) and above to comments since those were not obtained via an exhaustive search (but believed to be correct). - _Lieven Clarisse_, Jan 29 2017. I restored a(4)-a(6), see note above. - _N. J. A. Sloane_, Jan 31 2017
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