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Search: id:A096233
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| A096233 |
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Number of digits of the 10^n_th tribonacci number (A000073). |
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+0
1
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| 2, 26, 264, 2646, 26464, 264649, 2646494, 26464944, 264649443, 2646494434, 26464944348, 264649443484, 2646494434842, 26464944348425, 264649443484250, 2646494434842508, 26464944348425087
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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a(n)/10^n tends towards log[10](rho) = .26464944348425087191..., where rho is the real root of x^3-x^2-x-1 = 0. - Vladeta Jovovic (vladeta(AT)Eunet.yu), Sep 01 2004
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MATHEMATICA
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rho=1/3*((19+3*Sqrt[33])^(1/3)+(19-3*Sqrt[33])^(1/3)+1); triboappr[n_]:=N[(rho-1)/(4rho-6)*rho^(n-3), 3000]; Table[MantissaExponent[triboappr[10^i]][[2]], {i, 1, 7}]
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CROSSREFS
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Cf. A068070.
Sequence in context: A067851 A072415 A121768 this_sequence A126673 A057351 A137100
Adjacent sequences: A096230 A096231 A096232 this_sequence A096234 A096235 A096236
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KEYWORD
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nonn,easy,base
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AUTHOR
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Michael Taktikos (michael.taktikos(AT)hanse.net), Aug 09 2004
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