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A068878
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sin(x)+exp(x)-1-2x=sum(n>=1,x^(2n)/a(n)).
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0
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2, 24, 60, 720, 40320, 181440, 3628800, 479001600, 3113510400, 87178291200, 20922789888000, 177843714048000, 6402373705728000, 2432902008176640000, 25545471085854720000, 1124000727777607680000, 620448401733239439360000
(list; graph; refs; listen; history; internal format)
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