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A144746
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a(n) = a(n-1)^2 - a(n-1) - 1, a(0)=6.
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5
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6, 29, 811, 656909, 431528777371, 186217085698878552894269, 34676803006183479266409218250231853558140150091, 1202480666729655584789949373132702064208272454072740050128160074167965751208292536045867158189
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OFFSET
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0,1
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COMMENTS
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a(0)=3 is the smallest integer generating an increasing sequence of the form a(n) = a(n-1)^2 - a(n-1) - 1, cf. A144743.
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LINKS
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FORMULA
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a(n) = a(n-1)^2 - a(n-1) - 1 and a(0)=6.
a(n) ~ c^(2^n), where c = 5.33565954034691307256446890777476398311129407641143635105306409567572... . - Vaclav Kotesovec, May 06 2015
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MATHEMATICA
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PROG
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(PARI) a(n, s=6)={for(i=1, n, s=s^2-s-1); s} \\ M. F. Hasler, Oct 06 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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