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A131761
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a(3n) = 3a(3n-1)-3a(3n-2)+2a(3n-3), a(3n+1) = 3a(3n)-3a(3n-1)+2a(3n-2), a(3n+2) = 3a(3n+1)-3a(3n), a(0) = 0, a(1) = 1, a(2) = 2.
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0
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0, 1, 2, 3, 5, 6, 9, 19, 30, 51, 101, 150, 249, 499, 750, 1251, 2501, 3750, 6249, 12499, 18750
(list; graph; refs; listen; history; internal format)
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