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A127688
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(n+1)^n - (2n)!!.
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1
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0, 1, 7, 61, 617, 7761, 117601, 2097047, 43046337, 999999055, 25937420761, 743008360293, 23298085076401, 793714773119009, 29192926024745505, 1152921504604819951, 48661191875656546561, 2185911559738662072543, 104127350297911055738281, 5242879999999999345270925
(list; graph; refs; listen; history; internal format)
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