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A048112
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a(1) = 1, a(2) = 1, a(3) = 1, a(n) = a(n-3) * (a(n-2) + a(n-1)).
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2
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1, 1, 1, 2, 3, 5, 16, 63, 395, 7328, 486549, 195081415, 1433122040192, 697379012200764243, 136045964066902820948075525, 194970470582876525091946983913863955456
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OFFSET
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1,4
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LINKS
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MATHEMATICA
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RecurrenceTable[{a[1]==a[2]==a[3]==1, a[n]==a[n-3] (a[n-2]+a[n-1])}, a, {n, 20}] (* Harvey P. Dale, Jan 14 2012 *)
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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