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A024293
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Expansion of e.g.f. log(1+sin(x)^2)/2 (even-indexed coefficients).
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1
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0, 1, -10, 256, -13840, 1282816, -181649920, 36478744576, -9861412096000, 3452931391553536, -1520176422094766080, 821908023102140317696, -535369559186849435484160, 413508899951810581475885056, -373681769282729298809313034240, 390605070751731814007608616943616
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OFFSET
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0,3
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LINKS
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MATHEMATICA
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With[{nn=30}, Take[CoefficientList[Series[Log[1+Sin[x]^2]/2, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, May 21 2014 *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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EXTENSIONS
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Extended with signs Mar 1997
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STATUS
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approved
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