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A097341
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Sum k=0..floor(n/2), Stirling2(n-k,k)2^k.
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1
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1, 0, 2, 2, 6, 14, 38, 110, 342, 1134, 3990, 14830, 58006, 237998, 1021462, 4574318, 21325462, 103287598, 518768406, 2697426926, 14498316182, 80440333998, 460112203798, 2710038058862, 16418576767126, 102212840258094
(list; graph; refs; listen; history; internal format)
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