Search: id:A088437
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%I A088437
%S A088437 1,1,1,2,6,32,288,4608,130560,6684672,621674496,106099113984,
%T A088437 33421220904960,19556188689530880,21359269286705627136,
%U A088437 43743783499173124374528,168632285389312394463805440,1227942828363775231508883701760,
               16941927202935006869128068433182720,444122456468619444070070837134825095168
%N A088437 Number of n X n orthogonal matrices over GF(2) modulo permutations of 
               rows.
%C A088437 Also the number of distinct self-dual bases for GF(2^n) over GF(2). - 
               Max Alekseyev, Feb 11 2008
%H A088437 Max Alekseyev, <a href="http://www.cs.ucsd.edu/users/maxal/gpscripts/
               ">PARI scripts</a>
%H A088437 Joerg Arndt, <a href="http://www.jjj.de/fxt/#fxtbook">Fxtbook</a>, see 
               p. 883.
%H A088437 Dieter Jungnickel, Alfred J. Menezes and Scott A. Vanstone, <a href="http:/
               /www.math.uwaterloo.ca/~ajmenezes/publications/sdb.pdf">On the Number 
               of Self-Dual Bases of GF(q^m) Over GF(q)</a>, Proc. Amer. Math. Soc. 
               109 (1990), 23-29.
%F A088437 a(n) = A003053(n) / n!.
%Y A088437 Cf. A053601, A135488.
%Y A088437 Sequence in context: A012324 A121676 A133596 this_sequence A005736 A123903 
               A005742
%Y A088437 Adjacent sequences: A088434 A088435 A088436 this_sequence A088438 A088439 
               A088440
%K A088437 nonn
%O A088437 1,4
%A A088437 Yuval Dekel (dekelyuval(AT)hotmail.com), Nov 09 2003
%E A088437 More terms from Max Alekseyev, Feb 11 2008

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