A018924 Number of isotropic subspaces of an n-dimensional symplectic space over GF(4).

1, 3, 9, 27, 297, 891, 38313, 114939

Offset

1,2

References

D. E. Taylor, The geometry of the classical groups, Heldermann Verlag, Berlin 1992.

Links

Table of n, a(n) for n=1..8.

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.

Crossrefs

Sequence in context: A202907 A032261 A300981 * A380159 A061582 A175129

Adjacent sequences: A018921 A018922 A018923 * A018925 A018926 A018927

Keyword

nonn,nice,more

Author

N. J. A. Sloane

Status

approved