%I #7 Nov 27 2020 06:46:05
%S 1,1,1,2,1,3,0,17,0,20,1,52,1,0,0,204,0,24,0,340,0,12,0,1056,0
%N Number of equivalence classes of pairs of complex Golay sequences of length n.
%C The number at length 20 is large but unknown. There are none at length 21.
%H Curtis Bright, Ilias Kotsireas, Albert Heinle, and Vijay Ganesh, <a href="https://arxiv.org/abs/1805.05488">Enumeration of Complex Golay Pairs via Programmatic SAT</a>, arXiv:1805.05488 [cs.LO], 2018. See Table 3.
%H R. Craigen, W. Holzmann and H. Kharaghani, <a href="https://doi.org/10.1016/S0012-365X(01)00162-5">Complex Golay sequences: structure and applications</a>, Discrete Math., 252 (2002), 73-89.
%Y Cf. A072128.
%K nonn,nice,more
%O 1,4
%A _N. J. A. Sloane_, Jun 26 2002
%E a(20)-a(25) from _Vincenzo Librandi_, Nov 27 2020