A158763 Number of equivalence classes of near-normal sequences NN(2n).

1, 2, 2, 3, 8, 14, 11, 24, 20, 18, 32, 12, 3, 20, 9, 8, 5, 1, 1, 1

Offset

1,2

Comments

Number of rows of Table 1 of Djokovic, pp.9-14, where "n" in the table is 2n as indexed in this sequence.

References

D. Z. Djokovic, Aperiodic complementary quadruples of binary sequences, JCMCC 27 (1998), 3-31. Correction: ibid 30 (1999), p. 254.

Links

Table of n, a(n) for n=1..20.

Dragomir Z. Djokovic, Classification of near-normal sequences, arXiv:0903.4390 [math.CO], 2009.

Dragomir Z. Djokovic, Hadamard matrices of small order and Yang conjecture, arXiv:0912.5091 [math.CO], 2009.

Dragomir Z. Djokovic, A new Yang number and consequences, arXiv:1007.5434 [math.CO], 2010; Designs, Codes and Cryptography 54:3 (2010).

C. Koukouvinos, S. Kounias, J. Seberry, C.H. Yang and J. Yang, Multiplication of sequences with zero autocorrelation, Austral. J. Combin. 10 (1994), 5-15.

C. H. Yang, On composition of four-symbol delta-codes and Hadamard matrices, Proc. Amer. Math. Soc. 107 (1989), 763-776.

Crossrefs

Sequence in context: A227380 A159789 A153932 * A001131 A019177 A153941

Adjacent sequences: A158760 A158761 A158762 * A158764 A158765 A158766

Keyword

nonn,more

Author

Jonathan Vos Post, Mar 26 2009

Extensions

5 more terms from the second Djokovic link, sent by Jonathan Vos Post and William P. Orrick, Jan 02 2010

Status

approved