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%I M3328 N1339 #26 Jun 19 2017 10:51:36
%S 1,4,8,12,17,22,27,32,37,42,47,53,58,64,69,75,81,86,92,98,104
%N Davenport-Schinzel numbers of degree 4 on n symbols.
%D R. K. Guy, Unsolved Problems in Number Theory, E20.
%D 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.
%D N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
%D N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
%D R. G. Stanton and P. H. Dirksen, Davenport-Schinzel sequences, Ars. Combin., 1 (1976), 43-51.
%H R. G. Stanton and P. H. Dirksen, <a href="/A002004/a002004.pdf">Davenport-Schinzel sequences</a>, Ars. Combin., 1 (1976), 43-51. [Annotated scanned copy]
%H R. G. Stanton and P. H. Dirksen, <a href="/A002004/a002004_1.pdf">Davenport-Schinzel sequences</a>, Ars. Combin., 1 (1976), 43-51. [Annotated scanned copy, different annotations from one above]
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Davenport-SchinzelSequence.html">Davenport-Schinzel Sequence.</a>
%Y A column of array in A259874.
%K nonn,nice,more
%O 1,2
%A _N. J. A. Sloane_.
%E Title improved by _Sean A. Irvine_, Feb 19 2016
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