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A136636
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a(n) = n * C(2*3^(n-1), n) for n>=1.
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3
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2, 30, 2448, 1265004, 4368213360, 106458751541142, 19173684851378353296, 26413015283743616538733008, 285290979402099025600644272168880, 24601033850235942230699563821233785600080
(list; graph; refs; listen; history; internal format)
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