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 A259874 Array read by antidiagonals upwards: Davenport-Schinzel numbers T(n,k), n >= 1, k >= 1. 4
 1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 4, 5, 4, 1, 1, 5, 7, 8, 5, 1, 1, 6, 9, 12, 10, 6, 1, 1, 7, 11, 17, 16, 14, 7, 1, 1, 8, 13, 22, 22, 23, 16, 8, 1, 1, 9, 15, 27, 29, 34, 28, 20, 9, 1, 1, 10, 17, 32 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 REFERENCES R. G. Stanton and P. H. Dirksen, Davenport-Schinzel sequences, Ars. Combin., 1 (1976), 43-51. LINKS R. G. Stanton and P. H. Dirksen, Davenport-Schinzel sequences, Ars. Combin., 1 (1976), 43-51. [Annotated scanned copy] R. G. Stanton and P. H. Dirksen, Davenport-Schinzel sequences, Ars. Combin., 1 (1976), 43-51. [Annotated scanned copy, different annotations from one above] EXAMPLE First few antidiagonals are: 1, 1,1, 1,2,1, 1,3,3,1, 1,4,5,4,1, 1,5,7,8,5,1, 1,6,9,12,10,6,1, 1,7,11,17,16,14,7,1, 1,8,13,22,22,23,16,8,1, ... The first few rows are: 1, 1, 1, 1, 1, 1, ... 1, 2, 3, 4, 5, 6, 7, 8, ... 1, 3, 5, 8, 10, 14, 16, 20, 22, 26, ... 1, 4, 7, 12, 16, 23, 28, 35, 40, 47, ... 1, 5, 9, 17, 22, 34, 41, 53, 61, 73, ... ... CROSSREFS Rows and columns include A005004, A005005, A005006, A002004. Sequence in context: A077028 A114225 A193515 * A256141 A072704 A038792 Adjacent sequences:  A259871 A259872 A259873 * A259875 A259876 A259877 KEYWORD nonn,tabl,more AUTHOR N. J. A. Sloane, Jul 09 2015 EXTENSIONS More terms from Sean A. Irvine, Feb 21 2016 STATUS approved

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Last modified May 7 20:36 EDT 2021. Contains 343652 sequences. (Running on oeis4.)