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A135756
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a(n) = Sum_{k=0..n} C(n,k)*2^[k*(k-1)].
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1
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1, 2, 7, 80, 4381, 1069742, 1080096067, 4405584869660, 72092808533798521, 4723015159635987920282, 1237987266193328694390243007, 1298087832233881093828346620725800
(list; graph; refs; listen; history; internal format)
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