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A228777 Decimal expansion of the third smallest Pisot-Vijayaraghavan number. 7
1, 4, 4, 3, 2, 6, 8, 7, 9, 1, 2, 7, 0, 3, 7, 3, 1, 0, 7, 6, 2, 8, 1, 2, 7, 6, 0, 7, 3, 8, 6, 9, 1, 1, 6, 0, 4, 6, 7, 6, 0, 1, 1, 9, 6, 6, 6, 5, 4, 5, 7, 1, 5, 9, 8, 4, 0, 9, 2, 3, 3, 7, 9, 3, 6, 2, 3, 7, 8, 4, 8, 3, 7, 8, 7, 4, 1, 8, 9, 0, 5, 0, 0, 3, 7, 5, 9, 0, 0, 7 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Iain Fox, Table of n, a(n) for n = 1..20000 (first 1000 terms from Vincenzo Librandi).

Wikipedia, Pisot number

FORMULA

A root of x^5-x^4-x^3+x^2-1.

EXAMPLE

1.443268791270373107628127607386...

MAPLE

fsolve(x^5-x^4-x^3+x^2-1, x, 1.4..1.5) ;

MATHEMATICA

Root[Function[x, x^5-x^4-x^3+x^2-1], 1] // RealDigits[#, 10, 90]& // First (* Jean-François Alcover, Feb 20 2014 *)

PROG

(PARI) { default(realprecision, 20080); x=solve(x=1, 2, x^5 - x^4 - x^3 + x^2 - 1); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b228777.txt", n, " ", d)); } \\ Iain Fox, Oct 23 2017

CROSSREFS

Cf. A060006, A086106, A092526.

Sequence in context: A194668 A138160 A120886 * A329205 A023402 A073261

Adjacent sequences:  A228774 A228775 A228776 * A228778 A228779 A228780

KEYWORD

nonn,cons

AUTHOR

R. J. Mathar, Sep 04 2013

STATUS

approved

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Last modified May 9 10:48 EDT 2021. Contains 343732 sequences. (Running on oeis4.)