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A098317
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Decimal expansion of 2 + Sqrt[5].
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24
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4, 2, 3, 6, 0, 6, 7, 9, 7, 7, 4, 9, 9, 7, 8, 9, 6, 9, 6, 4, 0, 9, 1, 7, 3, 6, 6, 8, 7, 3, 1, 2, 7, 6, 2, 3, 5, 4, 4, 0, 6, 1, 8, 3, 5, 9, 6, 1, 1, 5, 2, 5, 7, 2, 4, 2, 7, 0, 8, 9, 7, 2, 4, 5, 4, 1, 0, 5, 2, 0, 9, 2, 5, 6, 3, 7, 8, 0, 4, 8, 9, 9, 4, 1, 4, 4, 1, 4, 4, 0, 8, 3, 7, 8, 7, 8, 2, 2, 7, 4, 9, 6
(list; constant; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| This sequence is also the decimal expansion of ((1+sqrt(5))/2)^3. - Mohammad K. Azarian (azarian(AT)evansville.edu), Apr 14 2008
This is the length/width ratio of a 4-extension rectangle; see A188640 for definitions. [From Clark Kimberling, Apr 10 2011]
Its continued fraction is [4, 4, ...] (see A040002). - Robert G. Wilson v, Apr 10 2011
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FORMULA
| 2 plus the constant in A002163. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 02 2008]
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EXAMPLE
| 4.23606797...
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MATHEMATICA
| RealDigits[N[2+Sqrt[5], 200]][[1]] (*From Vladimir Joseph Stephan Orlovsky, Feb 21 2011*)
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CROSSREFS
| Cf. A001622, A014176, A098316, A098318.
Sequence in context: A010646 A160079 A123403 * A095185 A128009 A072425
Adjacent sequences: A098314 A098315 A098316 * A098318 A098319 A098320
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KEYWORD
| nonn,cons,easy
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AUTHOR
| Eric Weisstein (eric(AT)weisstein.com), Sep 02, 2004
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