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A259320 a(n) = 2*n*A259319(n) - A259110(n)^2. 1
0, 256, 3584, 21504, 84480, 256256, 652288, 1462272, 2976768, 5617920, 9974272, 16839680, 27256320, 42561792, 64440320, 94978048, 136722432, 192745728, 266712576, 362951680, 486531584, 643340544, 840170496, 1084805120, 1386112000, 1754138880, 2200214016 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
J. L. Bailey, Jr., A table to facilitate the fitting of certain logistic curves, Annals Math. Stat., 2 (1931), 355-359.
J. L. Bailey, A table to facilitate the fitting of certain logistic curves, Annals Math. Stat., 2 (1931), 355-359. [Annotated scanned copy]
FORMULA
a(n) = (64*(n^2-5*n^4+4*n^6))/45. - Colin Barker, Jun 29 2015
G.f.: -256*x^2*(x+1)*(x^2+6*x+1) / (x-1)^7. - Colin Barker, Jun 29 2015
EXAMPLE
n=3: 3584 = 6*1414 - 70^2.
MATHEMATICA
LinearRecurrence[{7, -21, 35, -35, 21, -7, 1}, {0, 256, 3584, 21504, 84480, 256256, 652288}, 40] (* Harvey P. Dale, Mar 01 2020 *)
PROG
(PARI) concat(0, Vec(-256*x^2*(x+1)*(x^2+6*x+1)/(x-1)^7 + O(x^100))) \\ Colin Barker, Jun 29 2015
CROSSREFS
Sequence in context: A205281 A185923 A185919 * A247931 A186200 A186197
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jun 24 2015
STATUS
approved

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Last modified February 22 08:27 EST 2024. Contains 370240 sequences. (Running on oeis4.)