%I #13 Sep 29 2023 21:52:14
%S 5,85,5525,1419925
%N Isotropic subspaces of a 2n-dimensional unitary space over GF(4).
%D D. E. Taylor, The geometry of the classical groups, Heldermann Verlag, Berlin, 1992.
%D C. Bachoc and G. Nebe, Classification of two genera of 32-dimensional lattices of rank 8 over the Hurwitz order, Experiment. Math. 6 (1997), 151-162.
%H C. Bachoc and G. Nebe, <a href="http://www.emis.de/journals/EM/expmath/volumes/6/6.html">Classification of two genera of 32-dimensional lattices of rank 8 over the Hurwitz order</a>, Experiment. Math. 6 (1997), 151-162.
%F Conjecture: a(n) = Product_{k=1..n} (4^k + 1). - _Vaclav Kotesovec_, Nov 21 2015
%K nonn
%O 1,1
%A _N. J. A. Sloane_