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A018925 Isotropic subspaces of a 2n-dimensional unitary space over GF(4). 0
5, 85, 5525, 1419925 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
REFERENCES
D. E. Taylor, The geometry of the classical groups, Heldermann Verlag, Berlin, 1992.
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.
LINKS
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.
FORMULA
Conjecture: a(n) = Product_{k=1..n} (4^k + 1). - Vaclav Kotesovec, Nov 21 2015
CROSSREFS
Sequence in context: A012815 A113107 A317355 * A309327 A363424 A174320
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified April 22 09:42 EDT 2024. Contains 371894 sequences. (Running on oeis4.)