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A098589
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a(n)=3a(n-1)+2a(n-3).
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0
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1, 3, 9, 29, 93, 297, 949, 3033, 9693, 30977, 98997, 316377, 1011085, 3231249, 10326501, 33001673, 105467517, 337055553, 1077170005, 3442445049, 11001446253, 35158678769, 112360926405, 359085671721, 1147574372701
(list; graph; refs; listen; history; internal format)
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