A005281 Davenport-Schinzel numbers of degree 6 on n symbols. (Formerly M4104)

1, 6, 14, 23, 34, 46

Offset

1,2

References

R. K. Guy, Unsolved Problems in Number Theory, E20.

D. P. Roselle and R. G. Stanton, Results on Davenport-Schinzel sequences, pp. 249-267 in Proceedings of the Louisiana Conference on Combinatorics, Graph Theory and Computer Science. Vol. 1, edited R. C. Mullin et al., 1970.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

Links

Table of n, a(n) for n=1..6.

Fausto A. C. Cariboni, All sequences of maximal size that yield a(6), Dec 01 2022.

Crossrefs

Cf. A002004, A005280, A259874.

Sequence in context: A190740 A084583 A022824 * A120345 A107400 A028557

Adjacent sequences: A005278 A005279 A005280 * A005282 A005283 A005284

Keyword

nonn,hard,more

Author

N. J. A. Sloane

Extensions

Name edited by Jinyuan Wang, Aug 09 2021

a(6) from Fausto A. C. Cariboni, Dec 01 2022

Status

approved