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A166036
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a(n)= (4^n+8*(-5)^n)/9.
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5
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1, -4, 24, -104, 584, -2664, 14344, -67624, 354504, -1706984, 8797064, -42936744, 218878024, -1077612904, 5455173384, -27007431464, 136110899144, -676259528424, 3398477511304, -16923668079784
(list; graph; refs; listen; history; internal format)
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