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A153059
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a(0) = 0, a(n) = a(n-1)^2 - n.
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9
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0, -1, -1, -2, 0, -5, 19, 354, 125308, 15702094855, 246555782835417471015, 60789754049585540423053668337098365130214, 3695394197409101611007702673065886746062029284385286815035968423367078017175685784
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OFFSET
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0,4
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LINKS
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FORMULA
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a(n) ~ c^(2^n), where c = 1.0469211647756727790926917384863725994592251990011465128982697545064576849... . - Vaclav Kotesovec, Dec 18 2014
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MATHEMATICA
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a=0; lst={}; Do[a=a^2-n; AppendTo[lst, a], {n, 0, 14}]; lst
RecurrenceTable[{a[0]==0, a[n]==a[n-1]^2-n}, a, {n, 12}] (* Harvey P. Dale, Aug 05 2013 *)
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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STATUS
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approved
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