A008993 - OEIS

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A008993

Numerators of coefficients in expansion of cube root of sin(x).

1, -1, -1, -53, -191, -20353, -16080599, -2454263, -1929502811, -234796649489321, -5861873873476337, -216960814836289519, -709848919641928941541, -3162120754204994494571, -2121145877577124094947, -25314492944947070077552347103, -1647232883667178291585597345249

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,4

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..237

MATHEMATICA

Numerator[CoefficientList[Series[(Sin[x]/x)^(1/3), {x, 0, 50}], x][[1 ;; -1 ;; 2]]] (* G. C. Greubel, Jul 21 2018 *)

CROSSREFS

Sequence in context: A142919 A142949 A061664 * A142088 A330810 A005146

Adjacent sequences: A008990 A008991 A008992 * A008994 A008995 A008996

KEYWORD

sign

AUTHOR

N. J. A. Sloane

EXTENSIONS

Terms a(14) onward added by G. C. Greubel, Jul 21 2018

STATUS

approved