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 A002875 Sorting numbers (see Motzkin article for details). (Formerly M1300 N0498) 10
 1, 2, 4, 24, 128, 880, 7440 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS How is the sequence defined (see the links in A000262)?  Also more terms would be welcome. Based on the Motzkin article, where this sequence appears in the last row of the table on p. 173, one would expect that this sequence is the same as A294202. However, they seem to be unrelated. So the true definition of this sequence is a mystery. - Andrew Howroyd and Andrey Zabolotskiy, Oct 25 2017 REFERENCES N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS Victor Meally, Comparison of several sequences given in Motzkin's paper "Sorting numbers for cylinders...", letter to N. J. A. Sloane, N. D. T. S. Motzkin, Sorting numbers for cylinders and other classification numbers, in Combinatorics, Proc. Symp. Pure Math. 19, AMS, 1971, pp. 167-176. [Annotated, scanned copy] OEIS Wiki, Sorting numbers CROSSREFS Cf. A000262, A001861, A002872, A002873, A002874, A036073, A294201, A294202. Sequence in context: A317999 A164313 A087981 * A110491 A019010 A275553 Adjacent sequences:  A002872 A002873 A002874 * A002876 A002877 A002878 KEYWORD nonn,unkn,more AUTHOR STATUS approved

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Last modified October 15 00:04 EDT 2019. Contains 328025 sequences. (Running on oeis4.)