A072128 Number of pairs of complex Golay sequences of length n.

16, 64, 128, 512, 512, 2048, 0, 6656, 0, 12288, 512, 36864, 512, 0, 0, 106496, 0, 24576, 0, 215040, 0, 8192, 0, 786432, 0

Offset

1,1

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. A072127.

Sequence in context: A043973 A153262 A316301 * A277016 A016802 A309573

Adjacent sequences: A072125 A072126 A072127 * A072129 A072130 A072131

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