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A079069
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a(n)=a(n-2)a(n-3)+a(n-3), n>3. a(1)=a(2)=a(3)=1.
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1
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1, 1, 1, 2, 2, 3, 6, 8, 21, 54, 176, 1155, 9558, 203456, 11040645, 1944642006, 2246285672576, 21470102051374515, 4368221476369196469462, 48227982626747161978326473216, 93786160880652497618461924784373935445
(list; graph; refs; listen; history; internal format)
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