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%I #3 Mar 30 2012 16:49:45
%S 1,5,325,333125,5458253125,1430853765453125,6001437102708869453125,
%T 402749632331680654432389453125,
%U 432449125237897791207428190509189453125,7429419400754766057344059513229133345069189453125,2042183254696046247075864924725939712088925233082669189453125,8981616938352999804189736540441162599045265812868432152715194669189453125
%N Product_{k=0..n} (4^(2k+1)+1).
%D J. A. Thas, Old and new results on spreads and ovoids of finite classical polar spaces, pp. 529-544 of A. Barlotti et al., eds., Combinatorics `90, North-Holland 1992.
%K nonn
%O -1,2
%A _N. J. A. Sloane_, Jul 03 2003