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A113785
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a(n) = a(n-1)^2 + 2*a(n-2).
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2
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OFFSET
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0,1
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REFERENCES
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Found in a Harpers' magazine article on Chinese civil service exam.
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LINKS
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MATHEMATICA
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RecurrenceTable[{a[0]==2, a[1]==3, a[n]==a[n-1]^2+2a[n-2]}, a, {n, 10}] (* Harvey P. Dale, Jun 20 2017 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Bob Mckaige (bobmckz(AT)yahoo.com), Jan 20 2006
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EXTENSIONS
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STATUS
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approved
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