A072127 Number of equivalence classes of pairs of complex Golay sequences of length n.

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

Offset

1,4

Comments

The number at length 20 is large but unknown. There are none at length 21.

Links

Table of n, a(n) for n=1..25.

Curtis Bright, Ilias Kotsireas, Albert Heinle, and Vijay Ganesh, Enumeration of Complex Golay Pairs via Programmatic SAT, arXiv:1805.05488 [cs.LO], 2018. See Table 3.

R. Craigen, W. Holzmann and H. Kharaghani, Complex Golay sequences: structure and applications, Discrete Math., 252 (2002), 73-89.

Crossrefs

Cf. A072128.

Sequence in context: A331094 A160169 A117778 * A186976 A160550 A172038

Adjacent sequences: A072124 A072125 A072126 * A072128 A072129 A072130

Keyword

nonn,nice,more

Author

N. J. A. Sloane, Jun 26 2002

Extensions

a(20)-a(25) from Vincenzo Librandi, Nov 27 2020

Status

approved