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A109581 E.g.f.: x/(1+x-x^3). 0
0, 1, -2, 6, 0, -120, 1440, -10080, 40320, 362880, -10886400, 159667200, -1437004800, 0, 348713164800, -9153720576000, 146459529216000, -1067062284288000, -25609494822912000, 1338096104497152000, -34060628114472960000, 510909421717094400000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..21.

MAPLE

G:=x/(1+x-x^3): Gser:=series(G, x=0, 26): 0, seq(n!*coeff(Gser, x^n), n=1..23); # yields signed sequence

MATHEMATICA

g[x_] = x/(-1 - x + x^3) h[x_, n_] = Dt[g[x], {x, n}] a[x_] = Table[h[x, n], {n, 0, 25}]; b = a[0]

CROSSREFS

Sequence having -G as o.g.f. is A104769.

Sequence in context: A213323 A293016 A122685 * A056876 A255484 A021797

Adjacent sequences:  A109578 A109579 A109580 * A109582 A109583 A109584

KEYWORD

sign

AUTHOR

Roger L. Bagula, Jun 29 2005

STATUS

approved

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Last modified May 6 00:41 EDT 2021. Contains 343579 sequences. (Running on oeis4.)