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A087288
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a(n)=2a(n-1)+a(n-2)-2a(n-3).
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2
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4, 4, 10, 16, 34, 64, 130, 256, 514, 1024, 2050, 4096, 8194, 16384, 32770, 65536, 131074, 262144, 524290, 1048576, 2097154, 4194304, 8388610, 16777216, 33554434, 67108864, 134217730, 268435456, 536870914, 1073741824, 2147483650
(list; graph; refs; listen; history; internal format)
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