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A153060
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a(0)=4, a(n)=a(n-1)^2 - n for n > 0.
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6
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4, 15, 223, 49726, 2472675072, 6114122011690205179, 37382487973834681475536573127118422035, 1397450407113894589170760370457882734663916414838438245542265330668373541218
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OFFSET
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0,1
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LINKS
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FORMULA
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a(n) ~ c^(2^n), where c = 3.8643187364012066048723545708047003493006832597186603613771125549936188672... . - Vaclav Kotesovec, Dec 18 2014
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MATHEMATICA
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RecurrenceTable[{a[0]==4, a[n]==a[n-1]^2-n}, a, {n, 0, 10}] (* Vaclav Kotesovec, Dec 18 2014 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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