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A004994
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6^n/n!*product[ k=0..n-1 ](6*k + 5).
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1
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1, 30, 990, 33660, 1161270, 40412196, 1414426860, 49707001080, 1752171788070, 61910069845140, 2191616472517956, 77702765843818440, 2758448187455554620, 98031004815728171880, 3487102885588044971160
(list; graph; refs; listen; history; internal format)
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