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 A001280 Number of permutations of length n by rises. (Formerly M4811 N2058) 2
 11, 309, 5805, 95575, 1516785, 24206055, 396475975, 6733084365, 119143997490, 2201649739310, 42514526708766, 857750898213594, 18068801884373310, 397038791150060850, 9090755207499817170, 216635190303090215910 (list; graph; refs; listen; history; text; internal format)
 OFFSET 8,1 REFERENCES F. N. David, M. G. Kendall and D. E. Barton, Symmetric Function and Allied Tables, Cambridge, 1966, p. 264. 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 Table of n, a(n) for n=8..23. FORMULA a(n) = A136123(n,4). - Emeric Deutsch and _Vladet Jovovic_, Dec 17 2007 Conjecture: D-finite with recurrence (n-8)*(n-9)*a(n) -(n-9)*(n^2-6*n-2)*a(n-1) +(2*n^3-33*n^2+143*n-118)*a(n-2) +(5*n^2-27*n+16)*a(n-3) -2*(n-5)*(n-3)*(n-4)*a(n-4) +(n-5)*(n-3)*(n-4)*a(n-5)=0. - R. J. Mathar, Jul 01 2022 CROSSREFS Sequence in context: A180056 A172506 A250551 * A100445 A193890 A317744 Adjacent sequences: A001277 A001278 A001279 * A001281 A001282 A001283 KEYWORD nonn AUTHOR N. J. A. Sloane EXTENSIONS More terms from Vladeta Jovovic, Nov 21 2007 STATUS approved

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Last modified March 5 09:44 EST 2024. Contains 370545 sequences. (Running on oeis4.)