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A270665
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E.g.f.: Product_{k>=1} 1/(1 - tan(x^k)).
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10
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1, 1, 4, 20, 136, 1016, 10112, 102080, 1259648, 16501888, 243214592, 3792156928, 66314635264, 1201731751936, 23824296632320, 496708324364288, 11065302289285120, 257749924759273472, 6397599337673523200, 165009476729535463424, 4496775223731602063360
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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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nmax = 25; Range[0, nmax]! * CoefficientList[Series[Product[1/(1-Tan[x^k]), {k, 1, nmax}], {x, 0, nmax}], x]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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