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A293557 Decimal expansion of real root of x^7 - x^6 - x^5 + x^2 - 1. 6
1, 5, 4, 5, 2, 1, 5, 6, 4, 9, 7, 3, 2, 7, 5, 5, 2, 4, 3, 2, 5, 2, 5, 5, 0, 6, 2, 4, 1, 0, 5, 1, 1, 6, 1, 1, 9, 6, 9, 1, 4, 7, 0, 0, 5, 5, 3, 6, 4, 2, 3, 3, 1, 2, 3, 5, 6, 0, 6, 1, 0, 7, 2, 5, 4, 9, 8, 2, 1, 1, 5, 8, 8, 1, 6, 6, 5, 3, 3, 1, 2, 0, 5, 0, 4, 3, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

This root is also the seventh smallest of the Pisot numbers.

LINKS

Iain Fox, Table of n, a(n) for n = 1..20000

Eric Weisstein's World of Mathematics, Pisot Number

Wikipedia, Pisot-Vijayaraghavan number

EXAMPLE

1.545215649732755243252550...

PROG

(PARI) solve(x=1, 2, x^7 - x^6 - x^5 + x^2 - 1) \\ Michel Marcus, Oct 13 2017

(PARI) { default(realprecision, 20080); x=solve(x=1, 2, x^7 - x^6 - x^5 + x^2 - 1); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b293557.txt", n, " ", d)); }

CROSSREFS

Cf. A060006, A086106, A228777, A092526, A293506, A293508, A293509.

Sequence in context: A279918 A273986 A246729 * A123587 A018840 A058209

Adjacent sequences:  A293554 A293555 A293556 * A293558 A293559 A293560

KEYWORD

cons,nonn

AUTHOR

Iain Fox, Oct 11 2017

STATUS

approved

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Last modified October 18 02:23 EDT 2019. Contains 328135 sequences. (Running on oeis4.)