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A166741
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E.g.f.: exp(2*asin(x))
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2
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1, 2, 4, 10, 32, 130, 640, 3770, 25600, 199810, 1740800, 16983850, 181043200, 2122981250, 26794393600, 367275756250, 5358878720000, 84106148181250, 1393308467200000, 24643101417106250, 457005177241600000
(list; graph; refs; listen; history; internal format)
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